Updated February 14, 2011 12:00 PM

After hours of chatting with friends at the PEOPLE/Entertainment Industry Foundation Screen Actors Guild Awards gala Jan. 30, Angie Harmon finally took a breather to change out of her sky-high heels. Leaning on husband Jason Sehorn, she slipped on Rollasoles ballet flats-freebies from the ladies lounge-and said, “You just roll them up, put them in your purse, and you’ve got a safety net.” While she didn’t have a backup for her pink Monique Lhuillier gown, she thought all the train-trampling was worth it: “The dress just screams, ‘Celebrate!'”

That was indeed the mood inside the packed SAG afterparty, where The Social Network‘s Jesse Eisenberg and Andrew Garfield linked arms with 127 Hours‘ Kate Mara so they wouldn’t lose one another. As she hugged Amy Poehler, Mariska Hargitay said she and pal Debra Messing were sharing a babysitter for their kids. Nearby, Kim Kardashian chatted with Lea Michele and the Glee gang as deejay Michelle Peche spun dance tunes. Guests also enjoyed sliders, touch-ups at the L’Oreal Paris makeup stations, and Vince Camuto gift bags with certificates for Prive Salon and Pinkberry, and a DVD from Jennifer Aniston‘s favorite yoga teacher, Mandy Ingber.

The Fighter‘s Melissa Leo, who took home the Best Supporting Actress statue, was absolutely giddy amidst it all. “I’m completely and totally elated to get recognized by the actors tonight,” she said. “What could be better?” Just one thing, perhaps: giving back. So PEOPLE and EIF made a contribution to the SAG Foundation, a philanthropic group for actors in need, as our way of saying thank you.