Matt Damon joined up with his Behind the Candelabra costar Michael Douglas to premiere their new film at the Cannes Film Festival today. Matt also had his wife Luciana by his side and they snapped pictures of all the action as they made their way down the carpet. Matt and Michael are screening their HBO project in the South of France before it officially hits the small screen on Sunday, May 26. Earlier in the day, Matt and Michael attended a photo call and a press conference. They have been doing quite a bit of press for the biopic, which follows Liberace, played by Michael, and his young lover, played by Matt. Naturally, a story about a couple had to involve love scenes, and Michael revealed in a recent interview he wasn't exactly put off by the idea of kissing one of America's best-looking actors. He said, "As far as making out with Matt, it’s not so bad. We rehearsed the scenes. For me, I guess the biggest thrill is, when I first saw it, after a few minutes, I really forget it’s Matt. Matt and Mike, you know? I just forget it’s us."

Matt is in Cannes after wrapping up filming for his upcoming film with George Clooney, The Monuments Men, in Germany. The pair celebrated finishing the film by having a boys weekend at George's Lake Como estate earlier this month.

Brad Pitt traded his signature all-black wardrobe for a white ensemble to pose for the June/July issue of Esquire, which will debut on newsstands May 31. Brad is embarking on promotional duties for his latest film, World War Z, which hits US theaters next month, but the focus of his Esquire interview fell mainly on the importance of his family. A close friend of Brad's even shared story for the article to illustrate just how loving things can get within the Jolie-Pitt household revealing, "Once I walked in and Angie was standing there and Zahara walked up and said, 'Daddy, you're not going to start making out with Mommy again, are you?' And it's like that. This is a guy who has tried not to do any sexy scenes with other women since he's met Angelina. He's crazy about her, and she's the same way about him."

The interview was conducted before the news of Angelina Jolie's preventative double mastectomy was revealed, which Brad did not allude to during the feature. In addition to praising his long-time partner, he also spoke candidly about finding happiness and addressed the interesting reason behind why he likes to stay at home. Here's more from Brad Pitt in Esquire:

• On family: "I have a handful of close friends and I have my family and I haven't known life to be any happier. I always thought that if I wanted to do a family, I wanted to do it big. I wanted there to be chaos in the house. There's constant chatter in our house, whether it's giggling or screaming or crying or banging. I love it. I love it. I love it."
• On Angelina: "Angie is the best person."
• On catching flak for his poor recollection skills: "So many people hate me because they think I'm disrespecting them. So I swear to God, I took one year where I just said, 'This year, I'm just going to cop to it and say to people, "OK, where did we meet?"' But it just got worse. People were more offended. Every now and then, someone will give me context, and I'll say, 'Thank you for helping me.' But I piss more people off. You get this thing, like, 'You're being egotistical. You're being conceited.' But it's a mystery to me, man. I can't grasp a face and yet I come from such a design/aesthetic point of view. I am going to get it tested. That's why I stay at home."

It was a wild reunion for the cast of The Hangover at the premiere of the franchise's third installment in LA last night. Bradley Cooper broke from the NYC set of American Hustle to attend the big event alongside Ed Helms, and Zach Galifianakis. Newly-engaged member of the crew, Justin Bartha, was also on hand for the night of fun. The guys showed love for their costar Ken Jeong and the waiting fans, many of whom Bradley stopped to snap pictures with before heading into the screening. The ladies of the Hangover trilogy, including Heather Graham, Sasha Barrese, Gillian Vigman, and Jamie Chung all hit the red carpet as well to celebrate the film's Friday release. It'll be the first big holiday-weekend Summer movie matchup, since Fast & Furious 6 also hits theaters. If you can't decide which sequel to spend your money on, these pictures of Bradley Cooper looking hot in the Hangover Part III might help!

James Franco hit the red carpet at the Cannes Film Festival last night with his ex-girlfriend and current costar Ahna O'Reilly to premiere their new project, As I Lay Dying. The two were joined by costar Tim Blake Nelson as well as Rosario Dawson, who doesn't star in the film but does share a connection with James as they have both worked with Harmony Korine. (James starred in Harmony's most recent film, Spring Breakers, while Rosario made her film debut in 1995's Kids, which Harmony cowrote.) The premiere was a big deal for James, who also directed the movie. We caught up with Ahna earlier this week in Cannes, where she talked about how excited she was that James asked her to take on the female lead after the two had broken up. She said, "I knew James could get any number of actresses to play that role," adding, "I think he did a tremendous job and I'm so proud of it and proud of him."

Ahna also premiered her new project, Fruitvale Station, at Cannes earlier this week — be sure to check out Ahna, James, and all the other celebrities at the Cannes Film Festival!

Jessica Chastain arrived in Cannes over the weekend and she has already made a splash on the party circuit. She wore Shamballa earrings as she attended a Chanel and Vanity Fair dinner last night, alongside stars James Franco, Milla Jovovich, and Paz Vega. James stopped by the dinner after hosting a party in honor of his ex-girlfriend Ahna O'Reilly on a yacht earlier in the day. Ahna costars alongside James in his directorial debut, As I Lay Dying, which is premiering tonight at the festival.

As for Jessica, she is in the South of France to promote the 50th anniversary of Cleopatra. She will host a special screening of the newly restored project tomorrow and will also wear the famous emerald and diamond necklace Richard Burton gave to Elizabeth Taylor during the production of the film. Jessica stopped over in Cannes after wrapping up filming for her latest project, Miss Julie, in Ireland. Jessica posted photos of her visit to Ireland on her Facebook page, noting that it was "tough to say goodbye" to the Emerald Isle.

The music industry's hottest stars got glamorous for the 2013 Billboard Music Awards blue carpet on Sunday in Las Vegas. Taylor Swift wore a short and shimmery blue number, while Miley Cyrus went bold in a black and white jumpsuit. Selena Gomez showed skin in a sexy white dress, and Hayden Panettiere donned a gorgeous black gown. Click through to see who else stepped out for the star-studded show and what they wore! Plus, be sure to vote for your favorite looks in our fashion polls.

The Swiss watch brand IWC Schaffhausen gathered stars in France for the Cannes Film Festival in the town of Antibes last night for its For the Love of Cinema party. The location was the luxurious seaside Hotel du Cap-Eden-Roc, which made for a picturesque night. Rooney Mara, Naomi Watts, and Karolína Kurková were among the famous women who hit the red carpet wearing timepieces from the brand, as did actor Christoph Waltz and race car driver Lewis Hamilton. The group was treated to a performance by Jamiroquai's Jay Kay and dinner inside the hotel's restaurant.

Wearing a long-sleeved leather Balmain dress, Karolína discussed her bold choice and said, "It's not short!" She also revealed that her travels to Cannes were partially for work and partially for a family vacation with her husband, Archie Drury, and their son, Tobin. Naomi, meanwhile, wore a chic floral gown from Dolce & Gabbana. She told us on the red carpet that when in the South of France, she dresses the part. Though her day-to-day choices aren't fancy, she ups the fashion ante even more than usual for premieres and events at the festival's iconic Palais.