Rupert Grint. Grint played Ron Weasley, Harry Potter’s best friend, in eight Harry Potter movies. One of the first things he bought when he started earning movie-star money: a 1974 Mr. Whippy van—an ice cream truck. He’d wanted to be an ice cream man, before he discovered acting. “I keep my van well stocked. It’s got a proper machine that dispenses Mr. Whippy ice cream,” he told The Daily Mail. He’d have to have a license to sell ice cream, so instead, he drives around England and hands out free ice cream bars to kids.

Bruce Willis. During the shooting of Die Hard, director John McTiernan wanted the movie to look—and sound—as realistic as possible. He couldn’t use real bullets for the movie’s shootout scenes, of course, so he used extra-loud blanks, which better approximate the sound of real bullets. In the scene where Willis’s character shoots a terrorist through the bottom of a table, the gun was so close to Willis’s ear that he suffered permanent hearing damage.

Donal Logue. Logue is a character actor who pops up in a lot of movies and TV shows, and he’s starred on Grounded for Life and Terriers. In his spare time, he drives 18-wheeler trucks for fun. He parlayed that hobby into a business—he owns Aisling Trucking, a shipping and trucking company.

The cast of HBO’s Girls. The four main female cast members all have famous parents. Allison Williams (Marnie) is the daughter of NBC Nightly News anchor Brian Williams; Jemima Kirke (Jessa) is the daughter of Bad Company drummer Simon Kirke; Zosia Mamet (Shoshanna) is the daughter of playwright and screenwriter; Girls creator and star Lena Dunham (Hannah) is the daughter of acclaimed avant garde photographer Laurie Simmons.

Tom Hanks and Daniel Day-Lewis. Both are acclaimed film actors who have won multiple Oscars for Best Actor—Hanks for Philadelphia and Forrest Gump, Day-Lewis for My Left Foot, There Will Be Blood, and Lincoln. That’s not all they have in common. Both have adult sons who are trying to start a career in rap music. While a student at Northwestern, Chester Hanks—who bills himself as “Chet Haze”—recorded “White and Purple,” a Northwestern-themed takeoff on Wiz Khalifa’s hit “Black and Yellow.”

Gabe Day (his full name is Gabriel-Kane Day-Lewis) is an 18-year-old freshman at Sarah Lawrence University. In November he released a video for “Green Auras,” which the New York Post called the “worst rap video ever.” It’s since been removed from YouTube.