Knightley, who announced she was pregnant in December, hid her baby bump in a gorgeous, light blue Delpozo gown at the Critics' Choice Movie Awards. However, the actress admitted to ET's Brooke Anderson on the red carpet that her biggest fashion challenge is still ahead of her when the Oscars arrive in a little over a month.
"I honestly have no idea," Knightley confessed to Anderson when asked what she'll be wearing to the Academy Awards. "I don’t know what's happening with my body. So I have no idea what I'm going to look like. Who knows? Something that fits, hopefully!"
This is Knightley's second Oscar nomination after her Best Actress nom in 2006 for her role in Pride & Prejudice.
Check out the video for more from Knightley about how she slept through the Oscar nomination announcements.