Did she really just have a baby?!

Jennifer Garner worked her first red carpet Tuesday since giving birth to son Samuel, and she looked like perfection! The 40-year-old actress debuted her post-baby body at CinemaCon in Las Vegas, where she took home the Female Actress of the Year award.

The Arthur star is either on the best diet in the world, or she's just too busy with three children to eat! Either way, Ben Affleck's leading lady is looking lovely!