Scarlett Johansson at Comic-Con for The AvengersThe film fans may have been talking about Scarlett Johansson's appearance at Comic-Con because of her film projects. StyleList was talking about it because of her new haircut.

The 25-year-old actress debuted a new bob haircut this weekend when she appeared on 'The Avengers' panel at Comic-Con. Shoulder-length and layered with a slight wave, Johansson fashioned her locks in a carefree, bedhead style that looked hip and sexy.

Back in May, Johansson created a splash with her black catsuit-clad attire and curly red hair in 'Iron Man 2.' She then went back to her blonde roots to appear on the cover of V Magazine with sexy lingerie shots inside. InStyle also featured her on May's cover, but with ringlet-like curls. And most recently, working as the alluring model for international retailer Mango, Johansson wore a '70s-inspired 'do with long auburn-colored locks.

Out of all these looks, we are perhaps partial to her newest haircut -- which is especially provocative when paired with black crop, tuxedo blazer, black bustier and black slacks all by Dolce & Gabbana.