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Mark Strong, born Marco Salussolia, is an English actor. He began his acting career in the 1980s and has since established himself as a versatile and respected character actor. Strong is particularly well-known for his roles in films such as "Sherlock Holmes", "Kingsman: The Secret Service", "Zero Dark Thirty", and "Syriana". He is renowned for his intense and powerful performances, often portraying complex and morally ambiguous characters.