Scarlett Johansson
is red hot!

The actress looked stunning on the red carpet at the UK premiere of "Captain America: The Winter Soldier" on Thursday in London, rocking a sleeveless red dress from Vivienne Westwood's Red Label Fall 2014 collection.

Vamping up the look several notches, she styled her frock with Christian Louboutin animal print pumps and Sonia Boyajian jewels. She looked picture perfect with minimal eye makeup and a bold red lip.

While there are reports that the blonde beauty is expecting her first child with fiance Romain Dauriac, the 29-year-old isn't showing any signs of baby bump!

Johansson hit the Los Angeles premiere of the highly-anticipated sequel in a low-cut lace skirt and top. While the sexy ensemble dress showed off a lot of cleavage, it was nearly impossible to see her blossoming belly.

We can't wait to see Scarlett's next red carpet look!

What do you think of her premiere style? Tell toofab in the comment section below, and click "Launch Gallery" above to see more expecting celebrities.

Check out the video below to see more from the Los Angeles premiere of "Captain America."

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