Reese & Vince: Trouble on THA SET

Reese Witherspoon and Vince Vaughan strike me as an unlikely pair -- in movies and/or in reality -- and it seems like their differences might just be making filming on their new movie, Four Christmases, a bit challenging. Reese is a self-proclaimed Type A personality -- she even named her production company Type A Films -- Vince, on the other hand, is more like a Type D. "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," an on-set source tells Ben Widdicombe of Gatecrasher. "Then Reese tries to force Vince into blocking out each scene and running through their lines as Vince tries to convince her that he's an ad-libber and wants to play around and see where the scene goes." Even though they have very different methods, the filming of the flick remains on schedule. "She's a one-take perfectionist and Vince likes to try it a few different ways," laughs the spy. "Sometimes Vince will be standing behind her and he has this look on his face that he just wants to kill her!"