Melanie Griffith (14) and Don Johnson (22), "The Harrad Experiment" (1973)
When Melanie Griffith was 14, her mother Tippi Hendren starred in the low budget college sex comedy "The Harrad Experiment" with up-and-coming actor Don Johnson. Hendren had to seduce 22 year-old Johnson in one scene. Griffith was working as an extra on the film and decided to seduce Johnson, too. At 18, she and Johnson were finally married. For all of six months. Twelve years later, they got married again. They separated over substance abuse issues, reconciled and finally divorced for good after Griffith met her current husband Antonio Banderas on the set of "Two Much." Melanie Griffith is why you shouldn't be too hard on today's young stars for their stupid shenanigans.