Olivia Wilde and Leslie Mann: Dueling Dresses at "The Change-Up" Premiere

Jenny Peters
Olivia Wilde
FWD101 Olivia Wilde attends "The Change-Up" premiere in Los Angeles on Monday, August 1, 2011.

Despite the fact that the men are the main stars of the new movie "The Change-Up," it was the women who wowed at the film's premiere in Westwood on Monday, Aug. 1.

Ryan Reynolds and Jason Bateman are the two guys who trade bodies in the comedy penned by Jon Lucas and Scott Moore, the minds behind "The Hangover"; and all four guys rode the positive buzz down the red carpet at the Village Theatre as hordes of fans jostled for a view. But what really ignited the fans were their beautiful co-stars, Olivia Wilde and Leslie Mann, who turned heads in their form-fitting sheaths. Mann's embellished white Marchesa and Wilde's fire-engine red Antonio Berardi both showed just how fit and fabulous both the actresses are.

Wilde especially has to stay fit and strong, for she's been riding a rocket ship to the top of the Hollywood A-list in the last year. After making a name for herself starring in "House," the gorgeous thespian has jumped into feature films full force. She's already being seen in theaters this summer as a key player in "Cowboys & Aliens" and will join Justin Timberlake in the science-fiction thriller "In Time" later this year. It's a ride that has Wilde just a bit bemused, but thankful.

"At this point I don't know what's going to happen next week because everything seems to change so quickly," Wilde said with a laugh at the press junket for "The Change-Up." "And I just can kind of count my blessings and feel really lucky at this point, continue working really hard, and learning from all the people I'm working with. Because that's the most kind of satisfying thing about all of this is that I've had the chance to experience these kind of master classes in acting. From people like Harrison Ford, Daniel Craig, Jason Bateman, Ryan Reynolds, Leslie Mann, everybody. So it's been a good year."

And while the newly divorced Wilde came to the premiere solo, her also just-divorced co-star Reynolds had a special date to the show. Sandra Bullock, his friend and fellow actor in the 2009 hit comedy "The Proposal," arrived just in time to surprise him on the red carpet, and add fuel to the rumors that the pair has recently been stepping out together as more than friends.

Also on hand for the celebration and after party at the Hammer Museum down the street in Westwood was "The Change-Up" director David Dobkin, Jonah Hill, "Entourage" star Perrey Reeves and Mann's funnyman husband, writer-director Judd Apatow.