Stephen Mangan is an accomplished actor known for his work in theatre and television. He attended Haileybury College and later studied Law at Gonville and Caius College, Cambridge University, where he became involved in drama productions. After a gap year in the United States, he realised that acting was his true passion. Following the death of his mother, he auditioned for the Royal Academy of Dramatic Art and graduated in 1994.

Mangan initially focused on theatre, believing it offered more creative freedom than film or television. He performed in various regional theatres and gained recognition for his roles in classics like "The Tempest" and "Hamlet." His performances with the Royal Shakespeare Company and Cheek By Jowl earned him a nomination for the Ian Charleson Award.

In 2001, Mangan gained wider recognition for his role in the BBC adaptation of "Adrian Mole: The Cappuccino Years." He later starred as Dr. Guy Secretan in the comedy series "Green Wing," which solidified his status in the industry. Mangan has portrayed self-absorbed characters in films like "Festival" and "Confetti," enjoying the spontaneity of improvised performances.

His stage work includes a praised revival of Alan Ayckbourn's "The Norman Conquests" at the Old Vic Theatre, which he later took to Broadway. He has also starred in productions such as "Jeeves and Wooster" and "Rules for Living" at the National Theatre.

Mangan's television credits include co-starring in "Episodes" alongside Matt LeBlanc and Tamsin Greig and portraying Tony Blair in "The Hunt for Tony Blair." He also starred in the BBC4 series "Dirk Gently." Currently, he is involved in the series "Houdini and Doyle," which explores the partnership between Arthur Conan Doyle and Harry Houdini.