Mark Gatiss is known for his role as Mycroft Holmes on the BBC TV show "Sherlock (2010-)".

He played various roles on the BBC TV show "The League of Gentlemen (1999-2002)" and in the "League of Gentlemen" movies, John Dashwood in the BBC TV miniseries "Sense and Sensibility (2008)" and Tycho Nestoris (2014-) on the HBO TV fantasy show "Game of Thrones (2011-)".

Some other TV shows he appeared on are "Harry", "The Dwelling Place", "In the Red", "Lenny Goes to Town", "This Morning with Richard Not Judy", "Randall & Hopkirk (Deceased)", "Barbara", "Dr. Terrible's House of Horrible", "Little Britain", "Catterick", "Footballers' Wives", "Agatha Christie's Marple", "Nighty Night", "Funland", "Jekyll", "Agatha Christie's Poirot", "Clone", "Crooked House", "Psychoville", "Midsomer Murders", "The Crimson Petal and the White", "Being Human", "Inspector George Gently", "Psychobitches", "Mapp & Lucia", "Wolf Hall", "London Spy", "Taboo" and "Doctor Who".

He played John Patterson in the movie "The Quatermass Experiment (2005)", Malcolm McLaren in "Worried About the Boy (2010)" and Colonel Theakes in "Dad's Army (2016)"

Some other movies he appeared in are "Birthday Girl (2001)", "Now You See Her (2001)", "Surrealissimo: The Scandalous Success of Salvador Dali (2002)", "Bright Young Things (2003)", "Sex Lives of the Potato Men (2004)", "Agatha Christie: A Life in Pictures (2004)", "Match Point (2005)", "Starter for 10 (2006)", "Fear of Fanny (2006)", "The Wind in the Willows (2006)", "The Worst Journey in the World (2007)", "Consenting Adults (2007)", "Purves + Pekkala (2009)", "Spanish Flu: The Forgotten Fallen (2009)", "The First Men in the Moon (2010)", "Coriolanus (2014)", "Coalition (2015)", "The Vote (2015)", "Victor Frankenstein (2015)", "Our Kind of Traitor (2016)", "Absolutely Fabulous: The Movie (2016)", "Denial (2016)" and "Against the Law (2017)".

Happy Birthday!