The actress, who is expecting her first child later this year, beamed as she walked the red carpet, ahead of the Academy Awards.
Keira is nominated for the Best Supporting Actress accolade and she's been busy promoting 'The Imitation Game' in the US, with her co-star Benedict Cumberbatch in recent weeks.
The 'Sherlock' star could also pick up an Oscar - if he can beat his long-term pal and fellow Brit actor Eddie Redmayne, that is.
See all the red carpet snaps below...
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