The Wedding Date (2005)

Kat Ellis must return to her parents' London home for her little sister's wedding and has to confront her ex-fiance, who dumped her two years before. In a desperate attempt to face the ordeal with dignity, Kat hires a top-drawer male escort to pose as her new boyfriend, only to realise that pretend relationships could be more nerve-racking than facing up to the truth.

Official website: http://www.theweddingdate.net/