Scarlett Johansson lived up to her character Black Widow's namesake color in a Versace LBD on the red carpet at The Avengers world premiere in LA this evening. We were LIVE as all the stars in the cast arrived — in case you missed it, watch our Avengers red carpet interviews here. Even with a busy promotional schedule ahead, Scarlett has been sticking with her other passions like politics. Just last week Scarlett hosted a fundraiser for Scott Stringer, who is running for mayor of NYC. Scarlett is also going strong with her artsy advertising executive, Nate Naylor.