Renee Zellweger @ 'Letterman'

Renee Zellweger arrives at the Ed Sullivan Theatre in NYC on Thursday for a taping of The Late Show with David Letterman, where the actress promoted her new flick Leatherheads. Co-star George Clooney was on the show earlier in the week.

Picture by Startracks

Ellen Pompeo on 'Letterman'

Ellen Pompeo struts her stuff while walking into the Ed Sullivan Theatre in NYC on Monday for a taping of The Late Show with David Letterman. The ep will air on Friday.

Picture by Sipa

Kate Bosworth Makes the Rounds

After appearing on Letterman, Kate Bosworth hit Live with Regis & Kelly! on Wednesday morning in NYC. Kate is doing the New York talk show rounds promoting her new flick, 21.

Picture by INF, via Just Jared

Kate Bosworth on 'Letterman'

Yesterday's Letterman star guest is Kate Bosworth. She arrived at the Ed Sullivan Theatre in NYC, to promote her new flick 21 on the show.

Picture by Wenn, via Just Jared

Demi Moore on 'Letterman'

Demi Moore arrives at the Ed Sullivan Theatre Monday for a taping of The Late Show with David Letterman in New York City.

Picture by Getty Images

Lauren at SoHo House

Lauren Conrad hit the popular SoHo House in NYC on Tuesday night, after appearing on The Late Show with David Letterman to promote The Hills.Picture by INF

Lauren Does 'Letterman'

Lauren Conrad appeared on the Tuesday March 18th episode of The Late Show with David Letterman to promote the new season of The Hills. She is seen here arriving at the Ed Sullivan Theater in NYC where Letterman is shot. Lauren and David Letterman talked about Lauren having ticks as a child...strange topic, but true. "Our house was in Orange County. The back was a huge canyon, and I was a really big tomboy when I was little. I’d always go hiking and I had a rock collection. And I’d come back up and… you get ticks! They’re gross," Lauren said of her childhood antics.

Pictures by Just Jared

Jim Carrey on 'Letterman'

Jim Carrey signed autographs for fans on his way into a taping of The Late Show with David Letterman on Monday afternoon in NYC. What he was wearing is a completely different story... Also on Monday night's show was My Name Is Earl actress Jamie Pressly.

Picture by Getty Images

Courteney Cox arrives for 'Letterman'

Dirt star Courteney Cox Arquette arrived for a taping of The Late Show with David Letterman in NYC on Tuesday night.

Picture by WireImage

Lucy Liu Arriving at Letterman

Cashmere Mafia actress Lucy Liu arrived for a taping of The Late Show with David Letterman on Tuesday in New York. Take off that Escada coat Lucy, we wanna see what's bright and pink underneath!

Pictur by Globe