Drew Barrymore
Barrymore was seven when she co-starred in Spielberg’s classic E.T. in 1982. In 1995, at the age of twenty, she was in the January issue of Playboy, in addition to appearing nude in a handful of movies from the ’90s and 2000s.
Jennifer Connelly
Connelly, born in 1970, was a minor for Once Upon a Time In America (1984), Sergio Leone’s epic gangster film with Robert DeNiro, and the cult classic Labyrinth (1986). As an adult, Connely has shown her stuff in upwards of five films, perhaps the most noted of these being Darren Aronofsky’s Requiem for a Dream (2000), where Connelly shows some bush while she looks at herself in the mirror (although it is not known if a merkin was used). There is also the classic sequence involving Connelly, another woman, and a dildo, but for the most part, the images are well-couched.
Shannen Doherty
Doherty, known for her roles in the TV series Beverly Hills 90210 and Charmed, as well as the films Heathers, Mallrats and Jay and Silent Bob Strike Back, began acting as a tween, mostly notably in Little House on the Prarie. None of her film work as a minor is particularly noted or famous, except for perhaps Ron Howard’s Night Shift, a comedy from ’82 starring Michael Keaton. Doherty was eleven. In her adult life, Doherty appeared nude in Blindfold: Act of Obsession (1994), in addition to other films, and also posed nude in Playboy for the December 2003 issue.
Molly Ringwald
Molly Ringwald (born 1968), who has essentially disappeared from popular culture, was a minor for both Sixteen Candles (1984) and The Breakfast Club (1985), two indisputable classics of the ’80s. She appeared nude in 1995’s Malicious, which I had never heard of until today.
Brooke Shields
Brooke Shields, actually, didn’t even bother waiting until she turned eighteen, and she is probably one of the most controversial figures when it comes to testing the limits of laws regulating minors in the media. She is perhaps most famous for her role in The Blue Lagoon (1980), a film that deals with adolescent sexuality. According to reports, at points in the film a body double was used for Shields, who was only 15 at the time. In 1986, at the age of 21, she appeared in the November issue of Playboy. 
