The Pirates of the Caribbean actress scored another fashion win in a royal purple frock at the star-studded ceremony on Sunday, 25 January.
As she's done throughout her pregnancy, Keira chose a loose fitting dress rather than a baby bump-hugging style.
She told E! correspondent Maria Menounous: "It just means you're not going to wear anything tight. Actually, people do wear tight things when they're pregnant, don't they? I don't want to go for that. So it's just on quite loose, which is quite nice".
Keira was accompanied to the SAG Awards by Klaxons musician husband James Righton.
The couple announced in December that they're expecting their first child together. They married in France in May 2013.
James has been at Keira's side throughout the Hollywood awards season, where she's been nominated all over the place for her role in The Imitation Game alongside Benedict Cumberbatch.
At last night's SAG Awards, she was honoured in the 'Outstanding Performance by a Female Actor in a Supporting Role' category but lost out to Patricia Arquette for Boyhood.
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