David Cassidy, the actor, singer and teen heartthrob best known as the band member with the green eyes and the feathered haircut on “The Partridge Family,” the 1970s television show about a family band, died on Tuesday in a hospital in Fort Lauderdale, Fla. He was 67.

His publicist, Jo-Ann Geffen, said the cause was liver failure. Mr. Cassidy, who lived in Fort Lauderdale, had recently been admitted to the hospital in critical condition.

Mr. Cassidy rose to fame on “The Partridge Family” playing Keith Partridge, the eldest of five children in a family that forms a band and goes on tour in a multicolored bus. His character, a high school student, was swooned over by young women as he learned to navigate his newfound fame.

It was 1970, with the turbulent late 1960s of the Vietnam War, race riots, psychedelia, Woodstock and Altamont barely past, when Mr. Cassidy got the lead role on the show. “The Partridge Family” was produced by Screen Gems, which had also been the company behind “The Monkees,” another sitcom about a pop band, which had its own heartthrob in Davy Jones.