1.
Milo Ventimiglia was 29 when he started dating his Heroes costar, 17-year-old Hayden Panettiere.
2.
Olivia Wilde was 19 when she and 27-year-old Tao Ruspoli got married.
3.
Bill Wyman was 47 when he started dating 14-year-old Mandy Smith. They got married when she was 18.
4.
Luc Besson was 31 when he started dating 15-year-old Maïwenn Le Besco. She was 12 when they met, and she gave birth to their daughter when she was 16.
5.
Uma Thurman was 19 when she and 31-year-old Gary Oldman married each other.
6.
Chad Michael Murray was 24 when he started dating 17-year-old Kenzie Dalton. She played an extra on One Tree Hill, and he proposed to her in 2006 when she was still a senior in high school.
7.
Cher was 18 when she married Sonny Bono, her first husband, who was 29.
8.
Fergie was 23 when she briefly dated 16-year-old Justin Timberlake.
9.
Demi Moore was only 17 when she married Freddy Moore who was around 28 or 29.
10.
Wilmer Valderrama was 29 years old when he met Demi Lovato at 17 and the two began dating once Demi turned 18.
11.
Kim Kardashian was 19 when she eloped with 30-year-old Damon Thomas, a music producer.
12.
Wilmer Valderrama was 24 when he dated Lindsay Lohan who was 18. However, they allegedly started their relationship when she was only 17.
13.
Drew Barrymore was 19 when she married 31-year-old Jeremy Thomas.
14.
Joel Madden started dating Hilary Duff when he was 24 and she was just 16.
15.
Shirley Temple was 17 when she married John Agar who was in his early 20s.
16.
Courtney Stodden was 16 when they got married to 51-year-old Doug Hutchinson.
17.
Taran Noah Smith from Home Improvement was 17 when he got married to 32-year-old Heidi van Pelt.
18.
Elizabeth Taylor was 18 when she married Conrad Hilton Jr. who was 24.
19.
Melanie Griffith was 18 when she married Don Johnson who was 26.
20.
Bo Derek was 19 and John Derek was 49 when they got married.
21.
And finally, Marilyn Monroe and James Dougherty were 16 and 21, respectively, when they tied the knot.