Katie Aselton

Kate Bosworth showed skin in a backless ensemble for the premiere of her latest film, Black Rock, in Hollywood last night. She was accompanied by her costars Lake Bell and Katie Aselton for the festivities. Ed Helms also made an appearance at the premiere for the film, which debuted at the Sundance Film Festival back in January and will be released in the US next Friday.

It has been a big week for Kate, who jetted back to the West Coast for her premiere following a Met Gala appearance on Monday in NYC. Kate donned a pink Balmain dress and was joined by her fiancé, Michael Polish, for fashionable festivities in the Big Apple earlier this week. Don't forget to vote for Kate in our POPSUGAR 100 bracket for a chance to win a Victoria Beckham handbag!

Ben Affleck caught up with Rachel McAdams on the red carpet at the LA premiere of their newest film, To the Wonder. Rachel wore a black lace dress as she greeted Ben and their costar Olga Kurylenko, who took a break from her promotional duties for Oblivion to attend the event. Plenty of other stars turned out for the movie's debut, including Homeland's Morena Baccarin, Zachary Levi, and How I Met Your Mother's Josh Radnor. During the premiere, Ben discussed how he and Jennifer Garner balance their busy schedules with their family life. Jennifer recently revealed that she is happy to work less for Ben, but now that she's got new projects on the horizon Ben is picking up more home duties. He said, "I'm preparing myself to take on some more of the burden [at home]. She's got a couple of movies coming up, so it's going to be a little Mr. Mom action, and I'm going to get back in the ring and we're going to see if I still have it."

Rachel has been spending her time in LA working on her press duties for the film, which hits theaters on Friday, April 12. She stopped by Disneyland with her friends and family earlier this month and appeared on Jimmy Kimmel Live! on Monday, where she revealed that she got hallucinations after buying pot in her native Toronto.

Diane Kruger brought longtime love Joshua Jackson with her when she attended the 2013 FX Upfronts bowling party in NYC yesterday. She wore a Jason Wu ensemble and red Chanel bag as she walked the red carpet and mingled inside the event with FX stars like Keri Russell and The League's Mark Duplass and Katie Aselton.

Diane is in town to do press for her film The Host, which hits theaters today, but she swung by the FX event to promote her new role in The Bridge, which premieres in July. She will play a detective who is trying to track down a serial killer operating on the US-Mexican border. Josh has been staying by Diane's side while she does promotional work around the Big Apple. He attended The Host's premiere in NYC on Wednesday, but stayed out of the limelight when she appeared on Good Morning America yesterday.