Reese Witherspoon and Matthew McConaughey posed for photographers before climbing the grand staircase at the Cannes Film Festival premiere of Mud Saturday. Reese chose a glamorous blue Versace gown for the formal event, while Matthew modeled a sexy tuxedo. Matthew and Reese began their day at a photocall for the film before capping off their evening with a screening and afterparty. It's Matthew's second premiere since arriving in France. He hit the red carpet on Thursday with Nicole Kidman, Zac Efron, and John Cusack at The Paperboy's star-studded premiere. The annual festival comes to a close this weekend. However, if you're hoping to look back at the glamorous parties and fabulous fashion, we've rounded up all the hottest photos from Cannes!

Kristen Stewart slipped out of her Reem Acra gown and into a Dolce & Gabbana t-shirt and sexy black shorts for Robert Pattinson's Cosmopolis Cannes Film Festival afterparty. Earlier in the evening, Rob hit the red carpet solo at the film's formal premiere, while Kristen stuck close to his best friend, and her On the Road costar, Tom Sturridge. The trip to France came right in the middle of Kristen's international Snow White and the Huntsman press tour. The film opens in theaters June 1, and Kristen's headed back to the states next week for a few more promotional stops. As for Rob, he's in the running for two of the hottest roles in Hollywood. New reports say Rob's considering the part of Finnick Odair in Catching Fire, the follow-up to The Hunger Games, and he's among the sexy guys competing to play Christian in Fifty Shades of Grey.

Beyoncé took the stage at the Revel resort and casino in Atlantic City last night, ready to put on a high-energy show for the sold-out crowd of 5,500 fans. In her first major performance since giving birth to daughter Blue, she pulled out all the stops and changed into four jaw-dropping costumes. Ralph & Russo created Beyoncé's couture looks, which are encrusted with more than 500,000 Swarovski crystals, and took into account her high-energy dance routines when coming up with the designs. For her part, Beyoncé delivered a two-hour set of her hottest tracks. From "Run the World," one of her more recent hits, to "Single Ladies" to "Halo," she kept the crowd on their feet all night. Perhaps one of the most surprising moments of the night came at the end of the show when Beyoncé shared new personal photos and film clips, including an image of the singer holding baby Blue in her arms.

Reese Witherspoon and Matthew McConaughey were all smiles posing side by side today at their Cannes photocall for Mud. Pregnant Reese wore a Versace dress that accentuated her growing baby bump. During a press conference earlier today, Reese talked about her supporting role in Mud, saying, "I grew up with my brother in a creek, riding dirt bikes, dirt fishing, everything you see the boys in the movie doing. When I read Jeff's script, it felt like home. It's a beautiful story about the place I'm from." Reese and Matthew are expected at tonight's red-carpet premiere as well.

The stars had a lot going on this week, with premieres, PDA, and parties. At the Cannes Film Festival, Robert Pattinson and Kristen Stewart celebrated her On the Road premiere with a passionate kiss, while Brad Pitt got sexy on the red carpet in a tuxedo for his Killing Them Softly screening. Gwyneth Paltrow looked glamourous in a white ensemble at a charity dinner for the Clinton Foundation, and the Beckham family showed their support for David at a dinner in his honor. There was plenty more action with some of our favorite celebrities. Check out the rest of the best pictures!