Sir Michael John Gambon is an Irish-British actor who has worked in theatre, television, and film. He was trained under Laurence Olivier and started his work on stage in the National Theatre. He received a Tony Award nomination for Best Actor in a Play for his work in David Hare's Skylight on Broadway. Gambon retired from stage acting in 2015 due to memory loss. Gambon is most famous for portraying Professor Albus Dumbledore in the Harry Potter film series, starting from the third film after the death of original actor Richard Harris. His other films include The Cook, the Thief, His Wife & Her Lover (1989), The Wings of the Dove (1997), Gosford Park (2001), Amazing Grace (2006) and The King's Speech (2010). Gambon has also appeared in the Wes Anderson films The Life Aquatic with Steve Zissou (2004), and Fantastic Mr. Fox (2009). Gambon has starred in various television programs, including The Singing Detective (1986), Wives and Daughters (1999), Cranford (2007), Emma (2009), The Casual Vacancy (2015), Churchill's Secret (2016), and Little Women (2017). He was knighted in 1998 for services to drama, and has won four BAFTA TV Awards, three Olivier Awards and was awarded the Irish Film & Television Academy Lifetime Achievement Award in 2017 for his contribution to Irish film. In 2020, he was listed at number 28 on The Irish Times list of Ireland's greatest film actors.