 Cowan has appeared in the films "The Golden Compass", "Happy-Go-Lucky", "The Christmas Miracle of Jonathan Toomey", "Love and Other Disasters", and "Howl".His theatre work includes productions of "The Revenger's Tragedy", "Women Beware Women", "Henry V", "The Seagull" and "Camille".He has recently played Stanley Kowalski in a revival of "A Streetcar Named Desire" at the Donmar Warehouse, and is attached to star in the movie "Heaven and Earth", a biopic of James Miranda Barry and can currently be seen in Les blancs at the National Theatre until June 2nd.