Sometimes the question about James Franco is whether he's an actor or is merely playing one, because he does many other things. He's written books -- including "Actors Anonymous" -- he's sung, and he's taught at New York University, Columbia and UCLA. In March, he'll release a book about Lana Del Rey.
Brad Pitt and Angelina Jolie are vintners, having produced a rosé from their 150 acres of vineyards at the Chateau Miraval in the south of France.
Aunt Luddy's White Trash is a snack sold at Walton's Fancy and Staple, a gourmet deli and bakery in Austin, Texas, owned by actress Sandra Bullock.
Kiss guitarist Paul Stanley also paints. Stanley, who attended New York's High School of Music and Art, became serious about his painting in the last decade or so.
Marilyn Manson, another painter, opens an exhibition of his work at a Cologne, Germany, gallery in 2007.
Rapper 2 Chainz loves food and has shared recipes from his tour bus in a cookbook called "#Meal Time." In 2014, there was talk of the rapper running for mayor of College Park, Georgia.
As if he didn't have enough on his plate, what with singing and acting, Justin Timberlake also owns Myspace, one of the first breakout social networks. He bought a chunk in 2011 and took a larger role after News Corp. sold the site in 2012. Myspace relaunched in June 2013.
Ashton Kutcher is also active in the tech world. He was an early investor in Skype and continues to back startups through his venture capital firm, A-Grade Investments.
Alyssa Milano is a huge baseball fan and doesn't mind if everybody knows. She's written a book about her love for the sport, "Safe at Home," and has contributed columns and interviews to variety of media.
Drew Carey has a particular interest in Major League Soccer's Seattle Sounders. He owns a share of the team.