Olivia Munn and Joel Kinnaman
Credit: Stephen Lovekin/Getty; Courtesy of Asos

Olivia Munn is a smart online shopper! The actress celebrated the New York premiere of her beau Joel Kinnaman's new romantic comedy Lola Versus wearing a black stretch jersey dress by Asos Collection ($35 at "I go on to Asos a lot, actually, especially at night," she told us at the Cinema Society, Brooks Brothers, and Grey Goose-sponsored after-party, held at the Top of the Standard. "They have a video where you can see how people walk in it, and you can see if the fabric is thick or thin and everything." She accessorized the form-fitting style with a vintage clutch and Christian Louboutin shoes. Now that's a great high-low mix!

Plus, see more sexy dresses under $100!