Kelly O’Sullivan is thrilled to return to Steppenwolf Theatre Company. Theatre credits include This is Modern Art, The Internationalist, Honest, Good Boys and True, The Crucible, 100 Saints You Should Know (Steppenwolf Theatre Company); Men on Boats, Bruise Easy, The Humans, Columbinus, The Dark at the Top of the Stairs (American Theater Company); The Seagull (Goodman Theatre); The Skin of Our Teeth (Remy Bumppo Theatre Company); Bad Jews (Theatre Wit); Hesperia (Writers Theatre); My Wonderful Day (Barrymore Award nomination – Outstanding Supporting Actress in a Play; The Wilma Theatre); The Lieutenant of Inishmore (Northlight Theatre); Jon (Collaboraction Theatre Company); Mr. Marmalade (Joseph Jefferson nomination – Principal Actress in a Play; Dog & Pony Theatre).Television credits include The Mob Doctor, Battleground two seasons of Sirens, and the History of Us pilot for CBS. Film credits include In Memoriam, Henry Gamble’s Birthday Party and Brother Sister. Kelly is a graduate of Northwestern University, The School at Steppenwolf. She is a 3Arts Make a Wave grantee and a recipient of a Princess Grace Fellowship for Theatre.