Chelsy Davy wearing two dresses to royal wedding

(CBS) Chelsy Davy will be dressed in green - and then blue - when she attends Prince William and Kate Middleton's wedding on Friday.

Italian designer Alberta Ferretti designed two different gowns for Prince Harry's on-again, off-again girlfriend to wear to the ceremony and reception.

Pictures: Prince Harry and Chelsy Davy
Complete coverage: The royal wedding

For the ceremony at Westminster Abbey, Davy will wear an aqua green bias reverse satin dress, paired with an aqua green faille silk jacket with a deep boat neck and a knot detail.

She'll change into a one-shoulder midnight blue crepe satin gown with a cut-out detail on the back for the reception that night at Buckingham Palace.

Davy, 25, and Harry, 26, broke up in 2009 after dating for five years, but their relationship now appears to be back on.

She was spotted in London on Wednesday reportedly shopping for wedding accessories, and the Daily Mail reported that she was helping Harry with his best man speech.