The 26-year-old recently married Sam Cooper in a ceremony near her home in Gloucestershire and was spotted in a French Delphine Manivet gown.
It had previously been claimed that Allen's close friend and Chanel boss Karl Lagerfeld had designed her dress for the big day but it has now been revealed that she wore that dress to her reception.
Lagerfeld recently posted a sketch of the dress he designed for her online along with a picture of Allen wearing it.
Allen also took to her Twitter page to confirm the second dress.
She said: 'I wore my BEAUTIFUL Chanel dress to our reception.'