The four-month itch can be a real drag when people marry too soon.

In May 2005, an overzealous Renee Zellweger wed country music star Kenny Chesney, whom she hardly knew, and split from him that September. (The marriage was annulled citing "fraud.") Her current boyfriend, Bradley Cooper, was briefly married to 'Blue Bloods' actress Jennifer Esposito, but that quickly ended in divorce.

Since 'Limitless' star Cooper and Oscar winner Zellweger have been married to others -- but for only four months each -- we're not sure either should be in a hurry to try it again.