Emmy Rossum slips into a frilly black minidress as she attends Sundance premiere of A Futile and Stupid Gesture.<br /><br />She is best-known for her role as feisty Fiona Gallagher in comedy series Shameless.<br />But Emmy Rossum was out to showcase her latest venture as she attended the premiere of A Futile and Stupid Gesture at the Sundance Film Festival in Park City, Utah, on Wednesday. <br />The actress, 31, showed off her slender physique in a flirty black minidress as she joined her co-stars to discuss the Doug Kinney biopic-comedy.<br />