Mark Valenti As Head Writer (70-plus episodes) and lyricist for Nickelodeon's LazyTown, Mark Valenti helped to propel that show to its #1 rating debut. He also served as Story Editor for Nickelodeon's bloc of animated shows including Rugrats, Catdog, Hey Arnold, and The Wild Thornberrys. He has created content for numerous Nickelodeon ancillary products, including computer games, books and commercials. He has also written for Back to the Future, Olivia, Gaspard and Lisa, Totally Spies, Kid Fitness, and My Friends Tigger and Pooh.

Valenti wrote the television movies Menno's Mind (1996), starring Billy Campbell, which debuted on Showtime, Like Father, Like Santa (1999), starring Harry Hamlin, which aired on the ABC Family Channel and The Christmas Pageant (2011), starring Melissa Gilbert, for the Hallmark Channel. He also wrote the high school fantasy comedy, The Devil and Danny Webster for The Disney Channel.

He scripted the annual holiday special, Mannheim Steamroller's The Christmas Angel, for NBC and received a gold record for the CD release of that project. His family/action feature film script Planet Fred was acquired by Dreamworks, and his family action comedy Bob the House was picked up by Paramount Studios. An action drama, Pursuit, was developed by Twentieth-Century Fox Studios.

Valenti was Creative Director for a team tasked with re-imagining Disney's California Adventures theme park in California, and also served as Creative Manager for Disney Interactive. Prior to his writing career, Valenti was Vice President of Development for John Hughes Entertainment, during the production period of Home Alone, Uncle Buck, Christmas Vacation, and Planes, Trains and Automobiles.

He has authored two books, The Hannibal Twist: A Tom and Huck Mystery, and "Last Night at the Monarch Motel."

Valenti began his career with a two-year stint as a Production Associate at Steven Spielberg's Amblin Entertainment, followed by several years as Script Analyst for Ron Howard, Oprah Winfrey and Sydney Pollack's production companies.

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