Reese Witherspoon knows her comedy, and went out of her way not only to star in Four Christmases with Vince Vaughn but produce it as well. When we talked this week, she spilled about who else she thinks is hilarious in movies these days, on SNL and from Sex and the City, and dropped some thoughts about a 30 Rock guest spot.

Oh, and she admits that she dressed up her Oscar for Christmastime, she really does. Hit the clip to get the full story.