The Bounty Hunter (2010)

Genres: Action | Comedy | Crime | Romance
starring: Jennifer Aniston and Gerard Butler.
Plot: A bounty hunter learns that his next target is his ex-wife, a reporter working on a murder cover-up. Soon after their reunion, the always-at-odds duo find themselves on a run-for-their-lives adventure.

http://en.wikipedia.org/wiki/The_Bounty_Hunter_(2010_film)