What's Your Number? is a 2011 American romantic comedy film directed by Mark Mylod, starring Anna Faris and Chris Evans. Written by Gabrielle Allan and Jennifer Crittenden, it is based on Karyn Bosnak's book 20 Times a Lady. It was released on September 30, 2011 to mostly negative reviews, with praise for its novel concept, the lead pair's chemistry along with Faris's performance, but criticism for its story and screenplay.

Anna Kay Faris is an American actress, podcaster, comedian and singer. She rose to prominence for her work in comedic roles, particularly the lead part of Cindy Campbell in the Scary Movie film series (2000–2006).