Not content with making one shoddy Christmas movie in his lifetime, Vince Vaughn has signed up to star in forthcoming festive blockbuster Four Christmases with Reese Witherspoon - a woman who he's not exactly BFFs with.

It's been reported that Vince Vaughn and Reese Witherspoon keep clashing on the set of Four Christmases, thanks to Reese's insistence that each scene is planned and perfected in advance being at direct odds with Vince Vaughn's preference to just roll up at the last minute and yammer stuff off the top of his head. One thing's for sure - Reese Witherspoon and Vince Vaughn had better fall in line pretty quickly and decide whether they want Four Christmases to be hammy and overacted or lame and half-hearted, because if they're both pulling in different directions then the movie runs the very real risk of being neither of those things at all.