马克·加蒂斯（Mark Gatiss）是英国演员、喜剧演员、编剧和小说家。他与里斯·希尔史密斯、史蒂夫·彭伯顿和联合编剧杰里米·戴森一起被称为喜剧团队绅士联盟的成员，并曾为电视剧《神秘博士》和《神探夏洛克》编剧并出演，后者也是他共同创作的。

Mark Gatiss (/ˈɡeɪtɪs/; born 17 October 1966) is an English actor, comedian, screenwriter, director, producer and novelist. He is best known for his work on television, acting in and co-creating shows with Steven Moffat. Gatiss has received several awards, including a BAFTA TV Award, a Primetime Emmy Award, a Peabody Award, and two Laurence Olivier Awards.

Gatiss co-created, co-wrote and acted in the BBC comedy series The League of Gentlemen (1999–2002). He co-created and portrayed Mycroft Holmes in the BBC series Sherlock (2010–2017) and Frank Renfield in the BBC / Netflix miniseries Dracula (2020). He also wrote several episodes of Doctor Who during Moffat's tenure as showrunner and two episodes during Russell T Davies' earlier tenure. His other TV roles include Tycho Nestoris in Game of Thrones (2014–2017), Stephen Gardiner in Wolf Hall (2015), and Peter Mandelson in Coalition (2015). He has acted in films such as Victor Frankenstein (2015), Denial (2016), Christopher Robin (2018), The Favourite (2018), The Father (2020), Operation Mincemeat (2021), and Mission: Impossible – Dead Reckoning Part One (2023).

On stage, Gatiss played Menenius in the revival of William Shakespeare's Coriolanus (2013), for which he earned a Laurence Olivier Award for Best Actor in a Supporting Role nomination. He took on the role of King George III in a revival of the Alan Bennett play The Madness of George III (2018). He portrayed Sir John Gielgud in the Jack Thorne play The Motive and the Cue (2023), for which he earned the Laurence Olivier Award for Best Actor. His other theatre roles include The Recruiting Officer (2012), The Vote (2015), and A Christmas Carol: A Ghost Story (2021).

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מארק גאטיס הוא שחקן, קומיקאי, תסריטאי וסופר אנגלי. הוא ידוע כחבר בצוות הקומדיה The League of Gentlemen לצד ריס שירסמית', סטיב פמברטון ושותף לכותב ג'רמי דייסון, וגם כתב וגם שיחק בסדרות הטלוויזיה דוקטור הו ושרלוק, את האחרונה שבהן הוא גם שותף -יוצר.

Марк Гэтисс (англ. Mark Gatiss; род. 17 октября 1966, Седжфилд, графство Дарем, Англия, Великобритания) — британский актёр, сценарист, продюсер, режиссёр и писатель, участник комик-квартета "The League of Gentlemen". Двухкратный лауреат премии Лоуренса Оливье (2016, 2024).