Sir Ian Holm Cuthbert (born 12 September 1931), known professionally as Ian Holm, is an English actor known for his stage work and many film roles. He received the 1967 Tony Award for Best Featured Actor for his performance as Lenny in The Homecoming and the 1998 Laurence Olivier Award for Best Actor for his performance in the title role of King Lear. He won the 1981 BAFTA Award for Best Actor in a Supporting Role for his role as athletics trainer Sam Mussabini in Chariots of Fire, for which he was also nominated for an Academy Award.

His other well-known film roles include Ash in Alien, Sir William Gull in From Hell, Father Vito Cornelius in The Fifth Element, and the hobbit Bilbo Baggins in The Lord of the Rings and The Hobbit film series.