David Bowie was so concerned for his son Duncan Jones during his student years, he constantly phoned to check up on him.
Movie director Jones, who was born Zowie Bowie, attended Vanderbilt University in Nashville, Tennessee to pursue a PhD in philosophy as a teenager.
But his famous father was confused by his son's choice of college, and bombarded him with calls for regular updates on his life.
Jones says, "I think he was baffled, to be honest. He was constantly asking me, why are you in Nashville? He was worried for me, concerned why I would put myself through that.
"When I didn't know what I was doing I was really hard on myself. When I was at graduate school you wouldn't have recognised me I was so different - and not a nice person: a grumpy, surly, upset, confused, lost person".