Allen Leech (born 18 May 1981) is an Irish actor best known for his role as Tom Branson on the historical drama series Downton Abbey. He made his professional acting debut with a small part in a 1998 production of A Streetcar Named Desire, made his first major film appearance as Vincent Cusack in Cowboys & Angels, and earned an Irish Film & Television Awards nomination in 2004 with his performance as Mo Chara in Man About Dog. Leech played Marcus Agrippa on the HBO historical drama series Rome. He also played Paul Prenter in the 2018 biopic Bohemian Rhapsody. Piano player and backing vocalist in Male Friends.