Reese Vs Vince

Why? We don't know when it happened, but some kind of law must've been passed in Tinseltown a few years ago, which meant that no one could ever visibly loathe their movie co-stars. So you'd have celebs a-plenty twittering on about what a "delight" so-and-so was to work with, when in actual fact they wished so-and-so would politely fall under the nearest Hummer.

So, we're currently loving the news that all is not sweetness and light with Reese Witherspoon and Vince Vaughn on the set of their new movie, Four Christmases.

"Vince rolls onto set in the morning looking like he just came in from a night out, while Reese will arrive early looking camera-ready," spilled an on set source. "She's a one-take perfectionist and Vince likes to try it a few different ways. Sometimes Vince will be standing behind her and he has this look on his face like he just wants to kill her!"