Question: Henry Wilfrid Brambell, was an Irish film and television actor best known for his role in the British television series "Steptoe and Son", and also performed alongside the Beatles in their film "A Hard Day's Night", playing which English singer-songwriter, multi-instrumentalist, and composer, that gained worldwide fame as the bass guitarist and singer for the rock band the Beatles, fictional grandfather?
Sentence (from "Wilfrid Brambell"): He also performed alongside the Beatles in their film "A Hard Day's Night", playing Paul McCartney's fictional grandfather.
Relevant evidence: Yes