Mario Lopez, Jr. ( born October 10, 1973) is an American television host and actor. Lopez has appeared on several television series, in films, and on Broadway. He is best known for his portrayal of A.C. Slater on
Saved By The Bell, who he also portrayed as a regular on
Saved by the Bell: The College Years. He has appeared in numerous projects since, including the third season of
Dancing with the Stars and as host for the syndicated entertainment news magazine show
Extra. He has also hosted
America's Best Dance Crew for MTV. In 2012, he co-hosted the second season of American version of
The X Factor with Khloé Kardashian, and was the sole host for the third season.