Witherspoon, Vaughn for 'Four Christmases'

'Rendition'

Reese Witherspoon and Vince Vaughn have signed up to star in festive comedy Four Christmases.

The pair will also produce the film, which tells the story of a couple who attempt to spend Christmas Day with all four of their divorced parents.

Robert Duvall will also feature in the movie, although it is unclear whether he will play Vaughn's or Witherspoon's father. King of Kong director Seth Gordon is at the helm.

Filming is due to begin in December, with an expected release of Christmas 2008.