The Late Show

Anne Hathaway looked ladylike in a red floral dress as she arrived at the Ed Sullivan Theater in NYC last night. She was there for an appearance on The Late Show to chat up Les Misérables ahead of its Christmas Day release. Anne and David Letterman chatted about her weight loss for the role with Anne joking that, "It wasn't so Fantine would look hot." After wrapping up the interview, Anne changed into a more dramatic look for the latest Les Mis premiere. Anne wore a black Tom Ford gown and strappy gladiator heels on the carpet. She had a slight wardrobe malfunction, though, and accidentally flashed photographers while exiting her car.

Jennifer Garner picked up a treat from the Prada store in NYC this morning and then changed into a navy dress for a busy afternoon. She fit in a shopping trip before getting started on a string of promotional appearances for The Odd Life of Timothy Green this week. Jennifer stopped by Late Show With David Letterman, where she greeted fans outside and met with the US Olympic women's gymnastics team backstage. She also posed at Sirius XM studios before attending a screening of her film. Her East Coast trip hasn't been just about work, though, since Jennifer was able to meet up with pal Victor Garber at his solo cabaret show. She also has her son, Samuel, to keep her company in the Big Apple. He wasn't by her side this afternoon, however, when she ventured out from her hotel wearing a blue dress.

Blake Lively continued her high-fashion press tour for Savages today. She appeared outside the Late Show's NYC studios before her interview with David Letterman and posed for photos decked out in a white Jenny Packham mini. Just yesterday, Blake was on the West Coast for the LA premiere of Savages. She hit the red carpet wearing a glamorous Zuhair Murad gown. It was a quick turnaround for Blake, who made in to the Big Apple right away. She's handling press before the Oliver Stone-directed picture arrives in theaters next Friday on July 6. The interviewing will continue tomorrow with Blake's stop on Good Morning America.

Jon Hamm suited up for an episode of the Late Show, which airs tonight, in NYC yesterday. He has multiple projects to promote with his new film, Friends With Kids, hitting theaters next week and the premiere of Mad Men on March 25. First up is his big screen comedy, which was written and directed by longtime girlfriend Jennifer Westfeldt. Jon and Jennifer both star in the film along with Kristen Wiig, Maya Rudolph, and others. The whole group hung out over the weekend at Vanity Fair's Oscar bash, where Jon's small screen costar, January Jones, partied as well.

Jon, January, and the rest of the cast are gearing up for the much anticipated fifth season of the series. Their onscreen daughter, Kiernan Shipka, hosted an event in LA last night to debut the latest Mad Men collection for Banana Republic. January, meanwhile, was recently spotted out near her home with son Xander, who was born just days before Mad Men picked up best drama at the Emmys last year.

Reese Witherspoon was just one of the lovely ladies to appear on the Late Show in NYC yesterday. She stopped by in a bright red dress to promote This Means War and shared a funny story about having to explain the term "d-bag" to her mother. David Letterman also welcomed Sports Illustrated's newest swimsuit cover girl, Kate Upton, and her fellow models. The 2012 Swimsuit Issue was unveiled last night while Reese's romantic comedy hits select theaters today — both just in time for Valentine's Day!

Sarah Michelle Gellar stopped by the Late Show in NYC to chat with David Letterman about Ringer yesterday. She was just one of the famous faces to sit down with Dave, since Super Bowl MVP Eli Manning was also a guest on the show. SMG apparently tried to meet the NY Giant backstage, but told Dave that "his security wouldn't let me near him. It was weird. I was trying. I was like, 'No really, I'm just a big fan.' I think that's where I went wrong. 'I just want an autograph and a lock of his hair!' But they said 'no' Awkward." She continued press this morning with an appearance on The Covino and Rich radio show at SiriusXM Studios and a visit to Live With Kelly. SMG debuted new bangs during the trip, which coincides perfectly with tonight's new episode of the small screen drama.

Michelle Williams posed for photographers before entering the Late Show With David Letterman studios in NYC last night. She was decked out in a floral dress from one of her go-to designers, Erdem. The interview Michelle taped will air on David Letterman's Friday episode. Michelle's home in NYC to spend time with her daughter, Matilda, and friends, but she clearly hasn't stopped making the rounds to chat up her movie My Week With Marilyn. Her role in the biopic earned an Oscar nomination in the category of best actress, and Michelle recently admitted to feeling surprised at the honor. Her name was the last of five to be called, and Michelle explained her reaction last week on the Today show. She's used to waiting for her name to be called, saying, "[It's] alphabetical. My whole life, I'm always the last to be called for any sports in school . . . . it's a "W" problem."