Harrison met McCartney on the bus to school, and the two bonded over their love of music. When McCartney joined Lennon’s band, The Quarrymen, he pushed for the group to welcome Harrison as well.
“I know this guy,” McCartney told Lennon, per the book George Harrison: Behind the Locked Door by Graeme Thomson. “He’s a bit young, but he’s good.”
“George was the youngest, and it was obvious,” author Tony Bramwell said. “He looked very young, even younger than his years. John Lennon didn’t particularly like him and didn’t want him in the band. He regarded him as too young, a kid, but Paul was pushing for him.”
Source: Emma McKee/cheatsheet.com