Michael Christopher Sheen is a Welsh actor, television producer and political activist. After training at London's Royal Academy of Dramatic Art (RADA), he worked mainly in theatre throughout the 1990s with stage roles in Romeo and Juliet (1992), Don't Fool with Love (1993), Peer Gynt (1994), The Seagull (1995), The Homecoming (1997), and Henry V (1997). His performances in Amadeus at the Old Vic and Look Back in Anger at the National Theatre were nominated for Olivier Awards in 1998 and 1999, respectively. In 2003, he was nominated for a third Olivier Award for his performance in Caligula at the Donmar Warehouse. Sheen has become better known as a screen actor since the 2000s, in particular through his roles in various biographical films. For writer Peter Morgan, he starred in a trilogy of films as UK prime minister Tony Blair—the television film The Deal in 2003, The Queen (2006), and The Special Relationship (2010)—earning him nominations for both a BAFTA Award and an Emmy. He was also nominated for a BAFTA as the troubled comic actor Kenneth Williams in BBC Four's 2006 Fantabulosa!, and was nominated for a fourth Olivier Award in 2006 for portraying the broadcaster David Frost in Frost/Nixon, a role he revisited in the 2008 film adaptation of the play. He starred as the controversial football manager Brian Clough in The Damned United (2009). Since 2009, Sheen had a wider variety of roles. In 2009, he appeared in two fantasy films, Underworld: Rise of the Lycans and The Twilight Saga: New Moon, and in 2010, he made a four-episode guest appearance in the NBC comedy 30 Rock. He appeared in the science-fiction film Tron: Legacy (2010) and Woody Allen's romantic comedy Midnight in Paris (2011). He directed and starred in National Theatre Wales's The Passion. From late 2011 until early 2012, he played the title role in Hamlet at the Young Vic. He played a lead role in The Twilight Saga: Breaking Dawn Part 2 in 2012. In 2013, he received a Golden Globe nomination for his role in Showtime's television drama Masters of Sex. Sheen played an incarcerated serial killer surgeon in Fox's 2019 drama Prodigal Son (2019), Aziraphale in the 2019 BBC/Amazon Studios miniseries Good Omens, and appeared as Chris Tarrant in Quiz. He played himself in the quarantine comedy show Staged with Good Omens co-star David Tennant throughout the COVID-19 lockdown. Sheen is politically engaged, and in 2017 he returned his OBE after conducting research on Wales's relationship with England.