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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

Beginning Boutique Hudson White Ruffle Maxi Dress white sequin mesh V-neck spaghetti strap tiered ruffle
Beginning Boutique Tina Pink Formal Maxi Dress pink satin one-shoulder draped ruched bodice maxi dress
Beginning Boutique Amber Glow Yellow Long Sleeve Maxi Dress light yellow long sleeve maxi dress with crew neck, ruched front, and high slit
Beginning Boutique Makeo Navy Maxi Dress navy bodycon cowl neck maxi with spaghetti straps ruched side and high leg split
£69.99£15.00
Beginning Boutique Tira Yellow Satin Mini Dress yellow satin cowl neck mini dress with pearl embellished straps and a low draped back
Beginning Boutique Zoey Blue Mini Dress light blue satin V-neck mini dress with a bow bust detail and front cutout
£59.99£20.00
Pink Satin Sleeveless Maxi Dress
Beginning Boutique Myka Yellow Strapless Maxi Dress yellow strapless maxi dress with a fitted bodice and a flowing floor-length skirt
Satin Pastel Blue Halterneck Maxi Dress with left leg slit
Beginning Boutique Shae Blue Satin Long Sleeve Maxi Dress off-shoulder neckline and a high side slit
Beginning Boutique Ryder White Strapless Ruffle Maxi Dress white maxi dress with halter ties, ruffle trim, side cutouts
Beginning Boutique Lenora Green Strapless Maxi Dress light green strapless maxi dress with a fitted bodice and high leg split
hot pink satin maxi dress with ruffle detailing and thin straps
yellow and pink floral print strapless maxi dress
Beginning Boutique Flossie Yellow Maxi Sleeveless Dress yellow straight neck maxi dress with spaghetti straps and a wrap tie waist
Full length view of a fitted pink satin strapless maxi dress with ruched side detail
Beginning Boutique Miranda Gold Velvet Formal Maxi Dress gold sequin strapless bodycon maxi with thin spaghetti straps
Beginning Boutique Trouble Blue Mini Dress light blue satin bodycon mini dress with lace trim sweetheart neckline and corset
Beginning Boutique Jacqulin Red Maxi Skirt red draped waist maxi skirt with a flared hem
Beginning Boutique Brandi Black Maxi Dress black fitted halter neck maxi dress with ruched sweetheart bust and thin straps
£59.99£20.00
Pink satin maxi dress with ruffled shoulder straps and a high side split revealing delicate lace trim
£59.99
Beginning Boutique Braelyn Yellow Strapless Maxi Dress yellow strapless maxi dress with a deep ruched V-neckline and flowy skirt
Beginning Boutique Luca Lilac Maxi Dress lilac ribbed knit maxi dress with sheer mesh overlay, ruffled mock neck, and ruched detail
Beginning Boutique Lili Pink Satin Strapless Maxi Dress pink satin strapless maxi dress with a bow front and waist cutouts
Beginning Boutique Attina Blue Satin Maxi Dress blue satin V-neck sleeveless maxi with knotted bust and front cutout
Beginning Boutique Tina Navy Formal Maxi Dress navy one-shoulder ruched fitted formal maxi dress
Full length view of a white off-shoulder satin formal dress with a fitted bodice and flowing maxi skirt
Red satin off-shoulder formal dress with a draped neckline, fitted bodice, and midi length
Beginning Boutique Marcella Blue Floral Formal Maxi Dress white blue and green floral print halter cowl neck fitted maxi dress
Beginning Boutique Elvira Pink Satin Formal Maxi Dress pink satin off-shoulder maxi dress with ruffled short sleeves and a draped neckline
Beginning Boutique Laria Yellow Satin Formal Maxi Dress pale yellow satin backless maxi dress with neck tie and large bow tie at back
Beginning Boutique Odette Cream Long Sleeve Formal Maxi Dress cream strapless ruched bodice maxi with sheer off-shoulder sleeves
Beginning Boutique Samira Yellow Maxi Dress yellow deep V-neck sleeveless ruched waist bodycon maxi dress with side split
£79.99£39.99
Beginning Boutique Glam Girl Pink Sequin Maxi Dress pink sequin V-neck bodycon maxi dress with a high side slit
Beginning Boutique Aura Black Maxi Dress black satin halter neck maxi dress with a deep cowl front and fitted waist
Beginning Boutique Wendy Sage Maxi Dress sage green satin V-neck maxi dress with ruffled spaghetti straps
£59.99
Beginning Boutique Lei Strapless Black Maxi Dress black strapless maxi dress with a folded bandeau neckline and fitted column silhouette
White strapless top with a gathered front and multiple tiers of ruffles
Beginning Boutique Arizona White Floral Print Maxi Dress white strapless bodycon maxi dress with orange and peach hibiscus print
Beginning Boutique Orlando Yellow Maxi Dress yellow strapless bodycon maxi dress with a high thigh split and ruffled trim
£69.99£34.99
Beginning Boutique Taleah Navy Formal Maxi Dress navy satin cowl neck maxi dress with side cutouts and criss-cross back straps
Beginning Boutique Darby Yellow Maxi Formal Dress pale yellow satin cowl neck maxi dress with off-shoulder sleeves and spaghetti straps
Beginning Boutique Kenza Blue Maxi Dress blue textured knit strapless bandeau top with waist cutout and high slit maxi skirt
£69.99£15.00
Beginning Boutique Lorelei Black Formal Dress black satin maxi dress with ruffled sleeves and a low scoop back
Beginning Boutique Farida Purple Lace Maxi Dress purple floral lace deep V-neck sleeveless bodycon maxi dress
Close-up of the yellow lace overlay on a cream fitted maxi dress with a deep V-neckline
Beginning Boutique Stacy Black Maxi Dress black satin V-neck maxi dress with lace trim, tie-front bust, and thin straps
Beginning Boutique Honey Pink Mini Dress honey pink satin bodycon mini dress with ruched bust and spaghetti straps
£49.99
Beginning Boutique Cindy Yellow Maxi Dress yellow asymmetrical neckline maxi dress with waist cutouts and wrap detail
Beginning Boutique Nahanee Red Ruffle Maxi Dress red V-neck maxi dress with spaghetti straps, ruffle trim, and a high side slit

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.