Allen was born in Hammersmith, London, the son of film producer Alison Owen and Welsh-born actor Keith Allen. His older sister is singer Lily Allen; her song "Alfie" is about him. He went to Windlesham House School in Sussex, Embley Park School near Romsey, St John's College in Portsmouth and the Fine Arts College in Hampstead, where he studied for his A-levels. He is also a third cousin of singer Sam Smith.
From 2017 to 2019, Allen was in a relationship with American DJ and model Allie Teilz, with whom he had a daughter, Arrow (born October 2018). He is a supporter of English football club Arsenal.
By Posted on