Choreographer Tyce Diorio was born on August 22, 1970 in New York City. Born Kieth Diorio, he is best known as a guest judge and choreographer for So You Think You Can Dance, being part of the show since its first season. He devised mostly jazz and contemporary routines for contestants. He has also choreographed routines for artists such as Janet Jackson, *NSYNC, Celine Dion and Toni Braxton, as well as for several films and Broadway plays.

Diorio also appeared as an actor in several productions from as early as 1993; he had minor roles in prominent films such as Starsky and Hutch, Mr. & Mrs. Smith and Epic Movie. Also, before he joined SYTYCD, he was a judge on the short-lived dance competition show Master of Dance.