Why Choose Allegra K for Prom 2026?

  • Affordable luxury pricing without compromising on quality
  • Inclusive sizing to flatter every figure
  • Free shipping on eligible orders
  • Trend-forward designs updated each season
Trending Prom Gowns & Formal Dresses
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77 products
Allegra K Strapless Velvet Backless Evening Gown Maxi Dress
Strapless Velvet Backless Evening Gown Maxi Dress
£63.00
Allegra K Sleeveless Satin Backless Side Slit Wedding Prom Dress
Sleeveless Satin Backless Side Slit Wedding Prom Dress
£57.00
Allegra K Elegant Halter Ruched Satin Sleeveless Midi Bridesmaid Wedding Party Dress
Elegant Halter Ruched Satin Sleeveless Midi Bridesmaid Wedding Party Dress
£56.00
Allegra K Luxurious Silky One Shoulder Sleeveless Slit Satin Maxi Dress for Weddings and Parties
Luxurious Silky One Shoulder Sleeveless Slit Satin Maxi Dress for Weddings and Parties
£49.00
Allegra K Satin V Neck Cap Sleeves Maxi Wedding Dress
Satin V Neck Cap Sleeves Maxi Wedding Dress
£50.00
Allegra K Spaghetti Strap Ruched Backless Satin Maxi Dress
Spaghetti Strap Ruched Backless Satin Maxi Dress
£48.00
Allegra K Satin Halter Sleeveless Backless Wedding Maxi Dress
Satin Halter Sleeveless Backless Wedding Maxi Dress
£48.00
Allegra K Off Shoulder Ruched Satin Wedding Maxi Dress
Off Shoulder Ruched Satin Wedding Maxi Dress
£39.00
-15%
Allegra K Sequin Mesh Spaghetti Strap Backless Slit Maxi Dress
Sequin Mesh Spaghetti Strap Backless Slit Maxi Dress
£60.00 £51.00 Save 15%
Allegra K Ruched One Shoulder Pleated Maxi Evening Dress
Ruched One Shoulder Pleated Maxi Evening Dress
£108.00
Allegra K Halter Neck Backless Pocketed A-Line Midi Dress
Halter Neck Backless Pocketed A-Line Midi Dress
£44.00
Allegra K V Neck Short Sleeve Chiffon Bridesmaid Maxi Dress
V Neck Short Sleeve Chiffon Bridesmaid Maxi Dress
£59.00
Allegra K One Shoulder Ruched Bodycon Slit Maxi Dress
One Shoulder Ruched Bodycon Slit Maxi Dress
£49.00
Allegra K Spaghetti Strap Backless Lace-Up Ruffled Slit Dress
Spaghetti Strap Backless Lace-Up Ruffled Slit Dress
£49.00
Allegra K Spaghetti Strap Backless Pockets A-Line Midi Dress
Spaghetti Strap Backless Pockets A-Line Midi Dress
£49.00
Allegra K V Neck Ruched Sleeveless A-Line Midi Dress
V Neck Ruched Sleeveless A-Line Midi Dress
£56.00
Allegra K Halter Lace-Up Ruched Sleeveless Midi A-Line Dress
Halter Lace-Up Ruched Sleeveless Midi A-Line Dress
£54.00
-15%
Allegra K Sleeveless Ruffled Hem Bodycon Midi Dress
Sleeveless Ruffled Hem Bodycon Midi Dress
£46.00 £39.00 Save 15%
Allegra K Floral Ruffled Square Neck Slit Maxi Dress
Floral Ruffled Square Neck Slit Maxi Dress
£51.00
Allegra K Sleeveless Ruched Textured Bodycon Fishtail Dress
Sleeveless Ruched Textured Bodycon Fishtail Dress
£79.00
Allegra K Backless Spaghetti Strap A-Line Midi Dress
Backless Spaghetti Strap A-Line Midi Dress
£46.00
Allegra K Vintage Spaghetti Strap Floral/Plaid Swing Dress
Vintage Spaghetti Strap Floral/Plaid Swing Dress
£46.00
Allegra K Boho All-Over Bloom Print Floral Adjustable Lace-Up Sleeveless A-Line Midi Dress
Boho All-Over Bloom Print Floral Adjustable Lace-Up Sleeveless A-Line Midi Dress
£42.00
Allegra K Flower Embroidered Puff Sleeves Midi Sheath Dress
Flower Embroidered Puff Sleeves Midi Sheath Dress
£136.00
Allegra K Flower Embroidery Short Sleeve Bodycon Fishtail Dress
Flower Embroidery Short Sleeve Bodycon Fishtail Dress
£136.00
Allegra K Bow Lace-Up Belted Slit Ruffled Sleeveless Midi Dress
Bow Lace-Up Belted Slit Ruffled Sleeveless Midi Dress
£46.00
Allegra K Lace Bow Bodycon Back Slit Maxi Evening Dress
Lace Bow Bodycon Back Slit Maxi Evening Dress
£79.00
Allegra K Tasseled Fringed Illusion Neck Slit Midi Cocktail Dress
Tasseled Fringed Illusion Neck Slit Midi Cocktail Dress
£68.00
-14%
Allegra K Elegant Deep V Neck Cap Sleeves Luxe Satin Pleated Midi Office Dress
Elegant Deep V Neck Cap Sleeves Luxe Satin Pleated Midi Office Dress
£49.00 £42.00 Save 14%
Allegra K V Neck Puff Sleeves Satin Ruched Midi Dress
V Neck Puff Sleeves Satin Ruched Midi Dress
£35.00
Allegra K Halter Neck Sleeveless Slit Bodycon Maxi Dress
Halter Neck Sleeveless Slit Bodycon Maxi Dress
£47.00
Allegra K Ruffled Off Shoulder Slit Satin Midi Wedding Dress
Ruffled Off Shoulder Slit Satin Midi Wedding Dress
£48.00
Allegra K One Shoulder Spaghetti Strap Backless Satin Dress
One Shoulder Spaghetti Strap Backless Satin Dress
£48.00
Allegra K Satin V Neck Cap Sleeves Backless Maxi Dress
Satin V Neck Cap Sleeves Backless Maxi Dress
£56.00
-15%
Allegra K Velvet Sequin Crew Neck Long Sleeves A-Line Midi Dress
Velvet Sequin Crew Neck Long Sleeves A-Line Midi Dress
£68.00 £58.00 Save 15%
Allegra K Sequin Embroidered Long Sleeve Round Neck Fishtail Dress Evening Gown
Sequin Embroidered Long Sleeve Round Neck Fishtail Dress Evening Gown
£125.00
Allegra K Mesh Embroidered Sequin Evening Gown Fishtail Dress
Mesh Embroidered Sequin Evening Gown Fishtail Dress
£113.00
Allegra K Sexy Sheer Swiss Dots Mesh Lace-Up Sleeveless Maxi Party Dress
Sexy Sheer Swiss Dots Mesh Lace-Up Sleeveless Maxi Party Dress
£45.00
Allegra K Off Shoulder Short Sleeves Tiered Midi Dress
Off Shoulder Short Sleeves Tiered Midi Dress
£59.00
-18%
Allegra K Solid Color Sleeveless Backless A-Line Midi Dress
Solid Color Sleeveless Backless A-Line Midi Dress
£68.00 £56.00 Save 18%
-25%
Allegra K Elegant Cold Shoulder Spaghetti Strap Midi A-Line Off-Shoulder & Flared Silhouette Summer Dress
Elegant Cold Shoulder Spaghetti Strap Midi A-Line Off-Shoulder & Flared Silhouette Summer Dress
£48.00 £36.00 Save 25%
Allegra K Flattering A-Line Silhouette with Asymmetrical Ruches Puff Sleeve Solid Color Ruched Midi A-Line Date Nights & Garden Parties Dress
Flattering A-Line Silhouette with Asymmetrical Ruches Puff Sleeve Solid Color Ruched Midi A-Line Date Nights & Garden Parties Dress
£43.00
-15%
Allegra K Solid Color One Shoulder Bodycon Maxi Cocktail Dress
Solid Color One Shoulder Bodycon Maxi Cocktail Dress
£54.00 £46.00 Save 15%
Allegra K Floral Patchwork Long Sleeve Satin Maxi Evening Dress
Floral Patchwork Long Sleeve Satin Maxi Evening Dress
£64.00
Allegra K Floral Jacquard Chiffon Puff Sleeves Smocked Back A-Line Dress
Floral Jacquard Chiffon Puff Sleeves Smocked Back A-Line Dress
£56.00
Allegra K Sleeveless Round Neck Sequin Mermaid Maxi Dress Evening Gown
Sleeveless Round Neck Sequin Mermaid Maxi Dress Evening Gown
£125.00
Allegra K Sequin Embroidered V Neck Sleeveless Evening Gown Maxi Dress
Sequin Embroidered V Neck Sleeveless Evening Gown Maxi Dress
£113.00
Allegra K Solid Color Short Sleeves Velvet Maxi Slit Dress
Solid Color Short Sleeves Velvet Maxi Slit Dress
£59.00