Born in Liverpool, England, he began acting in local theater before transitioning to film and television. Gaining recognition in the early 1990s, he portrayed John Lennon in both "The Hours and Times" and "Backbeat," showcasing his talent for capturing complex characters. Known for his versatile roles, he appeared in "Harry Potter and the Sorcerer's Stone" as Professor Quirrell. His career spans various genres, with notable performances in both British and international productions.