At 30, the Irish actress has already spent two decades in front of the camera, collecting many awards. Her two latest projects are also generating Oscars buzz.

She’d yell and scream and say the meanest things she could think of to her fellow actors. She’d go from euphoric to inconsolable on a dime in a chaotic, drunken haze.

Ronan is at her searching, sensational best in "The Outrun" in the change-of-pace role of Rona, a biologist living in London with her boyfriend Daynin (the excellent Paapa Essiedu), who grows increasingly impatient with the destructive hardcore party girl Rona has become.