Anna Faris has been a little bit of a slapper, or at least her character in What’s Your Number? has. After deciding to revaluate her life and her failure to find a man who sticks, she decides to look up the past 20 guys she slept with, find out what went wrong and whether they’ve improved with time. And to help her, she takes friend Chris Evans along for the ride (and what’s the odds he’s her true love?). What’s Your Number? hits cinemas this autumn. Click below for the trailer.