His mother, Lylie (Weech), is British, and taught handicapped children. His father, Clement Serkis, a doctor, was born in Iraq, of Armenian descent.
Has three children, a daughter, Ruby, and two sons, Sonny and Louis Ashbourne Serkis (born 19 June, 2004), the latter of whom will star in the film The Kid Who Would Be King (2019).
Was required to don a wetsuit and flail around in literally freezing water during re-shoots for The Lord of the Rings: The Two Towers (2002).
He went to St Benedict's School, London, UK.
Is a vegetarian.
Owns one of two prop rings used in "Lord of the Rings." The other went to Elijah Wood, who played Frodo Baggins.
Although he was critically acclaimed for the performances, he was ruled ineligible for Best Supporting Actor nominations at the 2003, 2004 and 2012 Academy Awards because his characters Gollum in The Lord of the Rings: The Two Towers (2002) and The Lord of the Rings: The Return of the King (2003) and Caesar in Rise of the Planet of the Apes (2011) were computer generated.