In Endless Love, Brooke Shields was 16. Martin Hewitt was 22 at the time. In the movie, they played lovers.
We asked the members of the BuzzFeed Community to tell us what age gap between a minor and the actor who played their love interest surprised them. Most of their responses were about underage female actors and male actors who were well over the age of 18. Here are some of the alarming casting age gaps they shared:
1. When they filmed My Father the Hero, Katherine Heigl was 14.

Universal Pictures
Dalton James was 22 during filming.

Universal Pictures
They played love interests in the movie.
Universal Pictures
During that second season, their characters on the show became romantically involved with each other.
The CW
3. Hilary Duff was 15 when she filmed A Cinderella Story.
Universal Pictures
Chad Michael Murray was 22 when he filmed the movie.
Universal Pictures
And their characters were an item.
Universal Pictures
4. Claire Danes was 15 during My So-Called Life.
ABC
Jared Leto was seven years older during the show, at 22 years old.
ABC
Their characters dated each other on the series.
ABC
5. Mila Kunis lied about her age to get cast in That '70s Show. She was 14 when she was cast and 15 when the first episode aired.
Fox
Ashton Kutcher was 20 at the time.
Fox
They played boyfriend and girlfriend on the show.
Fox
6. Selena Gomez was 15 during the first season of Wizards of Waverly Place.
Disney Channel
Brian Kubach was 24 when he appeared in the first season.
Disney Channel
During that season, they played boyfriend and girlfriend.
Disney
7. In Starstruck, Danielle Campbell was around 15 years old.
Disney Channel
Sterling Knight was around 20 years old in the film.
Disney Channel
At the end of the movie, they reconcile and he almost kisses her.
Disney Channel
8. In Endless Love, Brooke Shields was 16.
Universal Pictures
Martin Hewitt was 22 at the time.
Universal Pictures
In the movie, they played lovers.
Universal Pictures
9. Selena Gomez had just turned 16 when Another Cinderella Story was released.
Disney
Drew Seeley was 26 at the time.
Disney
They played love interests throughout the film.
Disney
10. Chloë Grace Moretz was 16 in If I Stay.
Warner Bros. Pictures
Jamie Blackley was 22 while filming the movie.
Warner Bros. Pictures
They played love interests in the film.
Warner Bros. Pictures
11. Madison Reyes from Julie and the Phantoms was only 16 during Season 1.
Netflix
Charlie Gillespie was 22 during Season 1.
Netflix
Their characters had a romance growing between them.
Netflix
12. Maitreyi Ramakrishnan was 17 while filming Never Have I Ever Season 1.
Netflix
Darren Barnet was 28 during the filming of Season 1.
Netflix
Daren Barnet and Maitreyi Ramakrishnan played love interests, and her character wanted to lose her virginity to him.
Netflix
13. Emmy Rossum was only 17 in Phantom of the Opera.
Warner Bros. Pictures
Gerard Butler was 33.
Warner Bros. Pictures
And Patrick Wilson was 30.
Warner Bros. Pictures
Both men played her love interests at some point, and she kissed both of them.
Warner Bros. Pictures
"I love that movie, but when I learned that, I was grossed out."
14. Keira Knightley was 17 while filming Pirates of the Caribbean: The Curse of the Black Pearl.
Buena Vista Pictures
Orlando Bloom was 25 while filming the movie.
Buena Vista Pictures
They played love interests in the film.
Buena Vista Pictures
"That one surprised me because I thought they were the same age until recently!"
15. Mandy Moore was 17 while filming A Walk to Remember.
Warner Bros. Pictures
Shane West was 23 during filming of the movie.
Warner Bros. Pictures
They played a couple in the movie.
Warner Bros. Pictures
16. And finally, J.C. Brandy was 17 when she guest-starred in the Star Trek: The Next Generation episode "Tapestry."
Paramount Domestic Television
Patrick Stewart was 52 during that episode.
Paramount Domestic Television
In the episode, their characters kiss and sleep together.
Paramount Domestic Television