In 2002 Lythgoe left Australia and moved to Hollywood to help produce American Idol with his father, Nigel. Lythgoe produced some of Idol's biggest success stories including Carrie Underwood and Ruben Studard. During this period Lythgoe was also the coordinating producer for So You Think You Can Dance. After six seasons of Idol and two of SYTYCD Lythgoe was poached by Steven Spielberg and Mark Burnett as a producer for the Fox Network's On The Lot. Upon completion Lythgoe was employed as an Executive for American Idol's parent company, Fremantle Media North America. During his contract Lythgoe produced CMT's Can You Duet, NBC's Celebrity Family Feud, Fox's Osbourne Reloaded and advised on America's Got Talent, I've Got Your Number and Let's Make A Deal.