It sure was a busy afternoon at The Late Show with David Letterman on Thursday. From this year’s Oscar host Billy Crystal to small-screen star Julia Louis-Dreyfus. There’s no doubt about it, the Ed Sullivan Theater was jam-packed with comedic talent and each of Mr. Letterman’s guests dressed to impress!

While Julia looked pretty in a fun polka-dotted frock, Billy kept it casual with a blue sweater, jeans and a black jacket. So many funny stars, so little time!

Photos by HRC/WENN