VIDEO: Oscar Frontrunners Cemented: Colin Firth & Natalie Portman Win Top Acting Honors At SAG Awards

The King's Speech reigned supreme at Sunday's Screen Actors Guild Awards, taking home the honors for Outstanding Performance by a Cast in a Motion  Picture, while star Colin Firth picked up the Best Actor award. Meanwhile, Natalie Portman won Best Actress for her dark turn in Black Swan, making her and Firth the clear Oscar frontrunners.

"I'd like to thank security for letting me into the building," Firth joked during his acceptance speech, a reference to The King's Speech's resurgence as an Oscar favorite against a strong field of critics’ darlings like The Social Network, The Fighter and Black Swan.

Other big winners at the ceremony included The Fighter stars Christian Bale and Melissa Leo, who collected the awards for Best Supporting Actor and  Actress, respectively.

Bale accepted his award accompanied by the ex-boxer he plays in The Fighter, Dicky Eklund, who he thanked "for living the life," and letting him play him in the film.

Next month, all of the great performances will go head-to-head on the grandest stage of them all, the 83rd annual Academy Awards. James Franco and Anne Hathaway will co-host the ceremony, which airs live on ABC from Hollywood's Kodak Theater on Sunday, February 27.

On the television side, HBO'S Boardwalk Empire won the SAG Award for Outstanding Performance by an Ensemble in a Drama Series while Modern Family won for Outstanding Performance by an Ensemble in a Comedy Series.

Alec Baldwin won his fifth straight SAG Award for Best Actor in a Comedy series, while Betty White won Best Actress in a Comedy Series for her role in Hot In Cleveland -- it was her first SAG Award at the age of 89.

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