Shaun Cassidy is an American singer, actor, writer, and television producer. He first rose to fame as a teen idol in the 1970s, with a string of hit songs like “Da Doo Ron Ron,” “That's Rock 'n' Roll,” and “Hey Deanie,” earning multiple platinum albums and a Grammy nomination. Around the same time, he starred in The Hardy Boys Mysteries on ABC and later took the Broadway stage in Blood Brothers. Cassidy transitioned behind the scenes as a successful television creator and producer, responsible for acclaimed series such as American Gothic, Cold Case, Invasion, Roar, and more recently, New Amsterdam on NBC/Netflix. He has earned praise for his originality and storytelling in both scripted TV and live performance.