Bill Wyman, the bass guitarist for the Rolling Stones for over 30 years, married Mandy Smith when he was 52 and she was 18. They had already been dating for 5 years at the time of the wedding. So yes, when they started dating he was 47 and she was 13.
It gets more bizarre, though. Wyman's oldest son Steven became engaged to Mandy's mother. Had they wed, Bill Wyman's wife would have been his granddaughter in law. Wyman's son would have been both her stepdad and stepson. Her mom would have been Wyman's mother in law and daughter in law. It just keeps going like that. And had they had kids? You do the math, lol. Crazy shit.