Philip O'Sullivan is an Irish actor with contributions to Irish arts and culture through his roles and performances in theatre, on film and on television. O'Sullivan has been involved with the Abbey Theatre Ireland since the 1970s. In 1975 he appeared in an Abbey Theatre production of a play by Irish playwright Teresa Deevy called Katie Roche where he played the part of Michael Maguire, this production ran for 21 performances. O'Sullivan is also known for voice acting roles and his character driven distinguishable voice forms the sound track for many advertisements.