She's the One (1996)

Synopsis
This is the second film by actor/director Ed Burns, his first being The Brothers McMullen. The two Fitzpatrick brothers, Mickey (Ed Burns) and Francis (Mike McGlone), would appear to have little in common, as the older is a rather volatile cab driver, the younger is a very settled stockbroker. Just prior to the time of the film, Mickey, after a whirlwind romance, married Hope (Maxine Bahns), one of his passengers. Francis has been married to his lifelong sweetheart (Jennifer Aniston) for some time. However, they are both very competitive about Heather (Cameron Diaz), an old flame of Mickey's. Mickey, who was once her fiance, left her when he found out she was sleeping with someone else. At the time of the story, Heather just happens to become a passenger in Mickey's cab, and they decide to finish exchanging belongings left over from their break-up. When Heather gives Francis (her current lover) the watch Mickey just returned to her, complications multiply. ~ Clarke Fountain, All Movie Guide