I can put my legs behind my head and sing 'Happy Birthday.' Because that's something that me and my friends used to do when we were in gymnastics class as kids, and I can still do it. I was doing it since I was 8 and 9. They used to call me Gumby. Very bendy.

Zajac. Debuting at the Sundance Film Festival the film won the Special Jury Award for Outstanding Ensemble Performance. In 2012 in addition to filming the third season of Shameless Rossum signed onto two film projects.

She currently stars on the Showtime dramedy Shameless as Fiona Gallagher. Her role in Mystic River (2003) garnered her wider recognition.