In honor of actor and Los Angeles Lakers superfan Jack Nicholson's 77th birthday today, we salute five of our other favorite celebrity sports fans.
1. Spike Lee: The legendary director might love the New York Knicks more than he does making movies. A fixture at Madison Square Garden, Lee even wrote a book about his fandom called "Best Seat in the House" in 1997.
2. Ashley Judd: The actress and Kentucky native grew up watching Wildcats basketball with her father and uncle and claims her passion for the team has been passed down through generations. The Kentucky graduate regularly attends games and often appears on sports talk shows to discuss her love for the Wildcats.
3. Billy Crystal: The comedian and actor's lifelong devotion to the New York Yankees was rewarded with a one-day contract during spring training in 2008. He struck out in his one at-bat against the Pittsburgh Pirates but called the experience "the greatest thing ever." Frequently spotted at Yankee Stadium, Crystal even directed the TV movie "61*" about Roger Maris and Mickey Mantle racing to break Babe Ruth's single-season home run record in 1961.
4. Ben Affleck: The Boston native often returns to his hometown to cheer on the Red Sox at Fenway. Affleck's wife, actress Jennifer Garner, has even said Affleck would not have married her had the team not won the World Series in 2004 because he would have considered her a jinx after the two attended a World Series game together.
5. Jerry Seinfeld: The comedian is such a dedicated New York Mets fan, he worked his loyalty into his classic television show. With multiple references and an epic Keith Hernandez storyline, Seinfeld put his fandom on full display. Today, he regularly attends games and even occasionally calls into a local sports-talk radio station as "Jerry from Queens" to talk about the team. In 2010 and again in 2013, he helped call games with Hernandez on SportsNet New York.