Sam Riley

Kristen Stewart teamed up with Garrett Hedlund, Kirsten Dunst, and Sam Riley at the NYC premiere of On the Road last night. Kristen chose another sheer look, this time a blue Erdem outfit, while Kirsten went neutral in Christian Dior. The costars posed for photos on their way into the screening, which was just the latest in a string of press events for the film. Kristen, Garrett, and Kirsten met up Wednesday for a special screening after Kristen and Garrett returned from a promotional trip to the West Coast. It's all leading up to the movie's limited release on Dec. 21.

Tom Sturridge left baby Marlowe at home this evening to attend the London premiere of his new movie, On the Road. His leading ladies, Kristen Stewart and Kirsten Dunst, weren't able to attend, but he did have the company of his fellow actors Sam Riley and Danny Morgan. Kristen had been scheduled to attend, but decided to skip in the wake of her recent personal issues. Tom, though, has been in London and didn't have to travel far for the screening at London's Somerset House. Tom and his fiancée Sienna Miller's baby, Marlowe, has been their center of attention for the last month, since the little one's July birth. They've been spotted frequently taking Marlowe out to get her first glimpses of their neighborhood. Sam, who actually has the biggest part in the movie, isn't yet a dad in real life. However, he has been married to his former costar in Control, Alexandra Maria Lara, since 2009.

Kristen Stewart joins her On the Road costars Garrett Hedlund and Sam Riley for a photo spread inside Marie Claire's September issue, on newsstands Aug. 17. Miley Cyrus posed for the cover, while Kristen and the boys teamed up for a few key promotional shots. The images were taken in May during the Cannes Film Festival, where Kristen was promoting her Jack Kerouac adaption and boyfriend Robert Pattinson was celebrating the Cosmopolis world premiere, which she also attended. Since then, things have taken a dramatic turn for the couple. Last month photos of Kristen cheating with Rupert Sanders shocked fans, and she's remained in hiding ever since. As for Robert, he temporarily moved out of their shared residence and relocated to Reese Witherspoon's Ojai estate; however, next week he'll make his first public appearance since news of the scandal when he visits The Daily Show With Jon Stewart on Monday.

Kristen Stewart hit the red carpet for her Cannes premiere of On the Road this evening. She had the company of costars Sam Riley, Garrett Hedlund, Tom Sturridge, and Kirsten Dunst. Kirsten wore pink Dior, and Kristen was in Balenciaga. The gang spent the whole day together, having attended a press conference and photocall earlier. The movie debuted at the film festival this morning — check out our movie review of On the Road. The picture is based on the classic 1957 Jack Kerouac novel, and in it Kristen plays Marylou, the object of affection for the two main characters, played by Sam Riley and Garrett Hedlund. It was a big risk for Kristen, who has actually been attached to the project since producers saw her in 2007's Into the Wild, because it involves more nudity than her Twilight movies.

At today's press conference, Kristen spoke about her character. She said, "I love Marylou. The character is so vivid, she jumps right off the page and slaps you in the face . . . If I had to choose one character who really, truly embodied the spirit of this book, it was her. She really is this amazing link between the two boys. It's a grand statement to make, but it might not have happened without her."

Tom Sturridge didn't bring along his pregnant partner Sienna Miller, but there were plenty of other celeb couples in attendance. Robert Pattinson turned up to support Kristen ahead of his own Cosmopolis debuting at Cannes this weekend. Sam Riley had wife Alexandra Maria Lara on his arm, and costars Garrett Hedlund and Kirsten Dunst were able to mix romance and work on the carpet.

Kristen Stewart and her On the Road cast mates gathered this morning for a photocall at the Cannes Film Festival. Kristen paired a white tee and black blazer with a pair of wild printed pants for the press session. She threw an arm around a Dolce & Gabbana-clad Kirsten Dunst for a series of girls-only pictures, then linked up with costars Sam Riley, Viggo Mortensen, Tom Sturridge, Garrett Hedlund, and Danny Morgan. Director Walter Salles was also on hand.Their movie just screened at the Grand Palais — make sure to check out our On the Road review.

Kristen's in France with the picture and her costars just ahead of her boyfriend Robert Pattinson's Cannes debut. He'll hit the Croisette himself with his David Cronenberg-directed Cosmopolis before the festival wraps up this weekend. Kristen and Robert aren't the only couple we're hoping to see making the rounds. Tom may have brought along his pregnant partner Sienna Miller, and Sam makes an adorable pair with his German actress wife, Alexandra Maria Lara. Kirsten was already hanging out with her boyfriend — she's dating costar Garrett.