Gillian Anderson, Olivia Colman, Emma Corrin, Julia Garner and Laura Linney were nominated for outstanding performance by a female actor in a drama series

Gillian Anderson beat out some stiff competition — including her own costars — at Sunday's Screen Actors Guild Awards.

She took home the award for outstanding performance by a female actor in a drama series for her performance in The Crown, beating out fellow nominees Olivia Colman (The Crown), Emma Corrin (The Crown), Julia Garner (Ozark) and Laura Linney (Ozark).

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Anderson, 52, won for her performance as Margaret Thatcher in season 4 of the Netflix royal drama. After thanking Linney and Garner, Anderson directed her attention to her costars with sweet shout-outs.

"To Queenie Olivia, you have won every award under the sun, and to Emma, you deserve this along with me for such a mature and accomplished performance," she said. "And to the entire Crown ensemble, who in my eyes does not get enough attention for all the depth that you bring to every episode."

Gillian Anderson

Anderson also thanked Peter Morgan, the creator of the show and her ex. The two were together for four years before they split in December, weeks after the fourth season of the show premiered to rave reviews.

"And last, but never least, Peter Morgan for creating so many multidimensional roles for all us actors to sink our teeth into and win awards for," she said. "Thank you, thank you, thank you."

Margaret Thatcher (GILLIAN ANDERSON) The Crown
Credit: Des Willie/Netflix

This marks Anderson's third SAG Awards win. She and the rest of the Crown cast also won for outstanding performance by an ensemble in a drama series.

She recently opened up about playing the controversial former prime minister, telling Deadline, "It's interesting playing a character like Thatcher because she's so divisive. People have opinions (of her) that don't sit in the middle of the road."

The 27th annual Screen Actors Guild Awards are airing from 6-7 p.m. PT/9-10 p.m. ET on TNT and TBS.