Legendary rocker Chuck Berry once mistook his opening group, which featured a young Johnny Depp, for his backing band - and asked the actor to tune his guitar for him.
Depp was just 17 when his band The Kids supported Berry at a concert in Atlanta, Georgia.
The 43-year-old tells Rolling Stone magazine, "I was in this band, The Kids. And we opened up for Chuck Berry in Atlanta. I was 17. He arrives. He comes into our dressing room. He thinks we're his band. So I was, like, stupefied.
"And he handed me his guitar and said, 'Tune it up.' So I plugged it and used the strobe tuner. He was like, 'What the f**k is that?' 'A strobe tuner, man.' He was mesmerised."