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Formal Dresses

Shop formal dresses, gowns, and cocktail styles! Find your perfect formal dress by exploring our dedicated Black Formal Dresses and Wedding Guest edits

A bright red strapless maxi dress adorned with large orange hibiscus floral prints- featuring a deep U-shaped neckline- suitable for a striking resort or summer event.
A sleek black mesh formal maxi dress with a fitted- ruched strapless bodice and a flowing skirt- perfect for a sophisticated event or prom.
Beginning Boutique Marriot Black One Shoulder Formal Maxi Dress black satin one-shoulder maxi dress with a thin strap and side slit
Beginning Boutique Alexia Blue Strapless Maxi Dress light blue satin strapless maxi dress with a ruched bodice and flowy skirt
Beginning Boutique Astlee Yellow Satin Formal Maxi Dress yellow satin cowl back maxi dress with criss-cross tie-back straps
Beginning Boutique Danni Light Yellow Tie Off Shoulder Formal Maxi Dress light yellow satin tie off-shoulder cowl back maxi dress with criss-cross straps
Beginning Boutique Blaise Navy Satin Maxi Dress navy satin maxi dress with a straight neckline, thin spaghetti straps, and a
Beginning Boutique Blaise Yellow Bloom Satin Maxi Dress yellow floral satin straight neck ruched bust maxi dress with thin st
Beginning Boutique Ella Hot Pink Off Shoulder Formal Dress hot pink off-shoulder maxi dress with draped neckline and fitted silhouette
Beginning Boutique Dekota Hot Pink Contrast Maxi Dress hot pink maxi with light pink satin V-neck bust, spaghetti straps, and flowy tiered skirt
Beginning Boutique Kain Blue Strapless Maxi Dress light blue strapless maxi dress with ring detail cutout bust and side cutouts
Beginning Boutique Nakita Yellow Maxi Dress pale yellow satin V-neck maxi dress with spaghetti straps and a low scoop back with tie detail
Beginning Boutique Matilda Black Strapless Maxi Dress black strapless maxi dress with twisted knot waist detail
Beginning Boutique Ashley Yellow Sequin Strapless Maxi Dress yellow sequin strapless maxi dress with a ruched bodice
Beginning Boutique Imogen Yellow Bloom Maxi Dress yellow floral strapless bodycon maxi dress with all-over ruching
Beginning Boutique Lovella Black Polka Dot Maxi Dress black polka dot maxi dress with a V-neckline, short puff sleeves, and a flowing skirt
Beginning Boutique Arizona Purple Floral Print Maxi Dress purple and red floral strapless bodycon maxi dress
Beginning Boutique Imogen Purple Floral Print Strapless Maxi Dress vibrant floral print strapless ruched bodycon maxi dress
Beginning Boutique Beck Pink Floral Maxi Dress light pink floral print deep V-neck sleeveless ruched bodice bodycon maxi dress
Beginning Boutique Arizona Red Tile Print Maxi Dress red and white tile print strapless bodycon maxi dress
Beginning Boutique Kaden White Floral Print Maxi Dress white red floral print V-neck ruched bust ruffled cap sleeves side cutouts maxi dress
Beginning Boutique Inara Navy Ruffle Maxi Dress navy satin V-neck maxi with thin straps criss-cross tie back and tiered ruffl
Beginning Boutique Jamilla Pink Off Shoulder Formal Maxi Dress pink off shoulder ruched mesh bodice draped satin maxi dress
Pink tiered ruffle maxi dress with a ruched bust, halter neckline, and high leg split
Beginning Boutique Anica Yellow Off Shoulder Maxi Dress pale yellow satin off-shoulder maxi dress with ruched bodice and ruffled leg slit
Beginning Boutique Joey Black Maxi Dress black satin maxi dress with spaghetti straps and a lace-up corset back
Beginning Boutique Avery Pink High-Low Maxi Dress pink strapless ruched tulle high-low maxi dress with tiered skirt
blonde model wearing a yellow maxi dress with ruched bust details and a sweetheart neckline
Beginning Boutique Gabriella Navy Mesh Maxi Dress navy mesh sweetheart neckline maxi dress with embellished straps and low scoop back
Beginning Boutique Naveah Pink Off Shoulder Maxi Dress pink satin off-shoulder maxi dress with bustier bodice and ruched side
Beginning Boutique Eli Purple Maxi Dress purple satin V-neck maxi dress with wide straps open back and ruched elastic detail
Beginning Boutique Mackenna Yellow Strapless Maxi Dress yellow satin strapless maxi with side ruffle split and lace-up back
Beginning Boutique Honey White Floral Jersey Maxi Dress white jersey maxi dress with red hibiscus print ruched sweetheart neckline spaghetti straps and a side slit
Beginning Boutique Ashton Pink Floral Kisses Maxi Dress pink floral backless maxi dress with criss-cross tie-up straps
Beginning Boutique Maiana Lilac Strapless Maxi Dress lilac strapless maxi dress with twisted bust and flowy skirt
Beginning Boutique Lilliana Green Floral Print Maxi Dress mint green pink red floral print spaghetti strap sweetheart ruched bodice maxi dress
Beginning Boutique Marcus Black Maxi Dress black halter neck scoop neck bodycon maxi dress with side ruching and gold O-ring tie waist
Beginning Boutique Clare Pink Ruched Maxi Dress pink ruched sweetheart neckline tie spaghetti strap maxi dress with a flowy skirt
Beginning Boutique Rae Red Strapless Maxi Dress red floral lace strapless maxi dress with waist cutouts
Beginning Boutique Kim Magenta Strapless Ruffle Maxi Dress magenta strapless maxi dress with tiered ruffles and a high side slit
Beginning Boutique Krissy Cream Mesh Strapless Maxi Dress cream mesh strapless sweetheart neckline ruched bust and waist bodycon
Beginning Boutique Ella Pink Sequin Off Shoulder Formal Maxi Dress pink sequin off-shoulder ruched maxi dress
Beginning Boutique Gigi Pink Maxi Dress light pink satin strapless maxi dress with ruched bust and front cutout
£79.99£39.99
Beginning Boutique Ardette Green Maxi Dress green satin cowl neck maxi with spaghetti straps, corset bodice, ruched, high slit
£79.99£39.99
Beginning Boutique Jackson Blue Maxi Dress navy scoop neck bodycon maxi dress with spaghetti straps and ruched side
Beginning Boutique Rita Blue Sequin Strapless Maxi Dress blue sequin strapless bodycon maxi dress with ruched bodice and high leg slit
Beginning Boutique Erica Pink Maxi Dress pink satin one-shoulder draped neckline fitted maxi dress with side ruching
£79.99£39.99
Beginning Boutique Merlo Black Strapless Formal Maxi Dress black satin strapless maxi with ruched waist and thigh high split
Beginning Boutique Sarah Black Corset Formal Maxi Dress black satin corset bodice sweetheart neckline cutouts maxi dress
Beginning Boutique Maiah Pink Floral Print Maxi Dress pink satin strapless bandeau maxi dress with large abstract floral print

Formal Dresses UK — Beginning Boutique

Get dressed up for your next big occasion with one of our stunning formal dresses from Beginning Boutique. Take your pick from our exclusive range of formal wear so hot you'll have everyone asking where you got your dress from! New arrivals drop weekly, so you'll always find the latest trends, styles, and fits — with so many styles to choose from, you'll be absolutely spoilt for choice.

What Colour to Wear to Formal?

Choose a colour that highlights your personality. Go bold with a red formal dress, radiate elegance in a strapless black formal dress, or opt for full glam in yellow or pink. We have a rainbow of choices, each designed to make you feel confident and completely yourself.

Recommended Formal Dresses for Weddings and Black Tie Events

Beginning Boutique has you sorted for every special occasion — from formals and weddings to cocktail parties and black tie events. Our ruched maxi dresses are perfect for a summer wedding guest look, and our flowy wrap dresses are absolutely stunning for bridesmaids. For black tie, choose a classic off-the-shoulder black maxi or a sleek long-sleeved bodycon. Or make a statement in a head-turning red formal dress — guaranteed to get you noticed!

Slip, Draped, or Belted — The Choice Is Yours

Whether you're drawn to a sexy slip style with a thigh-high leg slit, hot long-sleeve designs, or the perfect silhouette of a belted dress, our formal dresses are made from the best range of luxury fabrics — silky soft, with a natural sheen that hugs your curves perfectly.

What to Wear to a Formal Event

Your dress should reflect your unique style! Opt for a sophisticated evening gown, a sleek LBD, or a playful pink formal. Our collection ranges from timeless maxi dresses to trendy slip and wrap styles, perfect for any mood or theme. Our three most popular styles right now:

     
  • The Slip Midi Dress. A bestseller that's so chic — you'll look amazing as you dance the night away.
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  • The Slip Formal Dress. A full-length style with a thigh-high leg slit for that extra dose of glam.
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  • The Maxi Dress. A flawless, flowing piece that never goes out of fashion — a perfect choice for any ball.

From Flowy Gowns to Midi Dresses and Everything In Between

Feel like a princess in our flowy formal dresses, a style icon in a trend-setting one-shoulder design, or steal the show in our best-selling midi or a cute A-line. With so many effortless options in a wide selection of colours and fabrics, we have a dress to complement every confident babe.

Luxe Fabrics with the Ultimate Wow Factor

When only the best will do! Our formal dresses and cocktail gowns are designed in luxury fabrics — soft, smooth, and with a natural sheen and lustre that adds a sophisticated finish to every look. Once your dress is sorted, browse our heels to complete the outfit. Classic black strappy heels or stilettos go with everything, or go for wedges if you're in a summery mood.

Tips for Accessorising Your New Dress

We have a gorgeous assortment of fine jewellery to elevate your formal look. Pair your cocktail or formal dress with pieces from our accessories range — gold rings, zirconia stones, and gems — for a polished, head-to-toe finish.

Finding the Right Design and Size for You

We offer formal dresses and ball gowns in a full range of UK sizes 4 to 22, ensuring every style preference and silhouette is beautifully catered for.

Buying Your Formal Dress Online at Beginning Boutique

Shop your perfect formal dress online now at Beginning Boutique. We offer express shipping so you'll have your look sorted well before the big night. Your cart prices are in GBP for a smooth shopping experience, and with Afterpay you can wear it now and pay over 8 weeks — interest-free. Set up your account today to add items to your wishlist so you never miss a new drop!

Frequently Asked Questions

What does "formal" mean as a dress code?

Formal attire means a full-length or midi-length dress in an elevated fabric — think satin, chiffon, lace or velvet. It's the dress code for events like galas, awards nights, black-tie dinners and school or university formals. The expectation is polished and put-together — not just dressed up. As a general rule, formal means floor-length or midi in a refined silhouette, paired with heels and minimal but considered accessories. Jeans, casual fabrics and short dresses typically fall outside what formal events expect.

What's the difference between black tie and formal attire?

Black tie is the strictest level of formal dress code. For women, it traditionally means a floor-length gown, though a sophisticated midi in an elevated fabric is now widely accepted. Formal attire is slightly more flexible — a midi or tea-length dress works alongside floor-length options, and the fabric and silhouette requirements are a little less rigid. If the invitation says black tie, err on the side of floor-length and elevated fabrics. If it says formal, you have more room to work with length and style.

Can you wear a short dress to a formal event?

It depends on the event. For strictly formal or black-tie occasions, a short dress generally falls outside the dress code and risks looking underdressed. For a school formal, semi-formal dinner or a less traditional event, a knee-length dress in a dressy fabric can work. If you're unsure, check the invitation for specific dress code guidance. When in doubt, a midi is almost always the safest middle ground — it reads as formal without committing to a full floor-length gown.

What fabric is best for a formal dress?

Satin is the most popular choice for formal wear — it photographs beautifully, drapes well and looks expensive without needing much embellishment. Chiffon and georgette are strong options for more flowy or layered silhouettes and tend to be more comfortable over a long event. Lace adds texture and detail and works well for evening events. Velvet is a strong choice for winter formal events. As a general rule, avoid very casual fabrics like jersey, cotton or linen for formal occasions — the fabric is a significant part of what makes an outfit read as formal.

What's the difference between formal and semi-formal?

Semi-formal sits between smart casual and full formal. For semi-formal events, a knee-length to midi dress in an elevated fabric is appropriate — you don't need a full gown. Formal requires a higher level of dressing — typically a floor-length or structured midi in a more refined fabric, with accessories and shoes to match. If the invitation says semi-formal, a cocktail-length dress or a polished midi is the right call. If it says formal, treat it like a step up from that and go longer and more considered with the fabric and silhouette.