With a price tag of £425, the gorgeous evening gown is made from soft jersey and features a high front split, deep v-neck and low diamond scoop back with cross back straps.
A lace mini skirt and modesty panel at the neckline add a classic feminine touch to the modern dress.
The creation was even worn by Georgia May and Lizzie Jagger for a shoot earlier this year.
To be in with a chance of winning the Alcazar dress, follow both @hellomag and @TemperleyLondon and tweet #HELLOTemperley.
All entries must be made before Sunday 22nd December. The winner will be chosen by random on Monday 23rd December and will be notified via direct message on Twitter. Click here for the Terms & Conditions.