The star, who scored the Best Supporting Actress prize for her role as a tenacious lawyer in The Mauritanian, appeared taken aback by the win as she cuddled her pet and kissed her wife, Alexandra Hedison, on the sofa.
She said: “Oh my god, are you kidding me? I think you made a mistake. I’m a little speechless, I just never expected to be here again.”
Hedison also donned nightwear, opting for black pyjamas with a cream trim.
During her final round of thanks, Foster included a surprising name – that of Green Bay Packers quarterback Aaron Rogers.
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She said: “I love my wife, thank you Alex, and Ziggy [the dog], and Aaron Rodgers and you know, the Hollywood Foreign Press. This is awesome!”
Foster is a huge fan of the Packers and Rodgers had previously mentioned her in a speech last month.
The NFL star is engaged to actress Shailene Woodley, with whom Foster stars in The Mauritanian.
Additional reporting by agencies
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