Notable for his roles as Tom Mitford and Jacob Thorne in the respective British television series North Square and Law and Order: UK, Rowan is also recognized for his stage work, which includes performances at London's National, Royal Court, and Donmar Warehouse theaters.
Early in his career, he appeared in the 1996 BBC miniseries No Bananas.
He performed in productions of Henry VIII and As You Like It at the famous Globe Theatre.
Born in London, England, he received his acting training at his home city's Central School of Speech and Drama.
He and Helen McCrory were both series regulars on the Channel 4 drama North Square.