SAG Stars: Let the Partying Begin!

Will there be cake? Birthday boy – who turns 30 on Monday – has the best seat in the house next to Friends with Benefits costar Mila Kunis and 30 Rock’s Jack McBrayer at the PEOPLE/Entertainment Industry Foundation afterparty inside L.A.’s Shrine Auditorium.

The Fighter’s and best supporting actress winner Melissa Leo – plus Mad Men’s January Jones – ditch their mostly male costars for a little girl time Sunday night at the PEOPLE/EIF party.

Though Glee didn’t nab any awards, can’t help but smile while arriving at the PEOPLE/EIF bash. “What a great night,” she later Tweeted. “So happy for Modern Family and the other winners!”

Listen up! Also at the PEOPLE/EIF party, Modern Family bombshell Sofia Vergara captivates presenter Angie Harmon and her hubby, Jason Sehorn.

After getting plenty of laughs during his acceptance speech, The King’s Speech star Colin Firth opts for a low-key celebration at The Weinstein Company’s post-SAG party hosted by Dewar’s at the Sunset Tower with A Single Man costar Nicholas Hoult.

She’s No. 1 in his book! Mark Ruffalo, goofing off at the PEOPLE/EIF celebration, gives big props to his The Kids Are All Right castmate Annette Bening despite her best actress loss to .

Clutching his best supporting actor SAG award, Christian Bale guides proud wife Sibi through the crowd at the PEOPLE/EIF party. “This statue sure is heavy, man,” he joked.

What is this, Cinderella? Glee’s Matthew Morrison playfully sizes up costar Jane Lynch’s fancy footwear while kicking back at the PEOPLE/EIF bash.

NBC’s leading ladies – and fellow New Yorkers – and Mariska Hargitay make a bold fashion statement while catching up at the SAG Awards afterparty at the Shrine Auditorium.

They’re definitely not singing the blues! Despite their best comedy ensemble loss, Angela Kinsey, Craig Robinson and Oscar Nuñez of The Office croon a happy tune at the PEOPLE/EIF celebration.

Julie Bowen shows off her afterparty outfit – a Catherine Malandrino halter pantsuit – while toasting Modern Family’s best ensemble cast win. “I’ll wear a gown again. I just needed a goddamn break from gowns,” she told PEOPLE.

Best actress winner Julianna Margulies and fellow category nominee Kyra Sedgwick get in a hug at The Weinstein Company’s post-SAG party hosted by Dewar’s at the Sunset Tower. “I didn’t think I’d win,” The Good Wife star told PEOPLE of her back-to-back SAG Actors. “I was taken aback.”

Leading men – and big winners of the night – Alec Baldwin and Steve Buscemi chat with fellow SAG nominees Mariska Hargitay and her “best girl” Hilary Swank at the HBO afterparty, held at Spago’s in Beverly Hills. “It was like a fun relaxing girls’ weekend,” Hargitay told PEOPLE of spending time with gal pal Swank.

The Social Network costars Andrew Garfield and best actor nominee Jessie Eisenberg continue keeping up appearances while hanging out at the PEOPLE/EIF afterparty.

might have been feeling under the weather – “I actually have a cold so I sound sexier,” she joked to PEOPLE – but the Temple Grandin best actress winner had a shoulder to lean on in fellow category nominee (and former Little Women costar) Susan Sarandon at the Shrine Auditorium.

Surprise best comedic actress winner Betty White gives a life-sized SAG statue a cheeky grab while enjoying her big night at the PEOPLE/EIF bash.