Peter Tork, a struggling musician who became an overnight teenage idol in the 1960s with the Monkees, died on Thursday at a family home in eastern Connecticut. He was 77.

His son, Ivan Iannoli, said the cause was complications from a rare form of cancer that was first diagnosed in 2009. Mr. Tork, who grew up in Connecticut, lived in Mansfield, east of Hartford, according to The Hartford Courant.

The Monkees were an unabashedly manufactured band, created by Hollywood producers in the 1960s to capitalize on the astounding popularity of the Beatles. The members — Mr. Tork (the oldest, at 24), Davy Jones, Micky Dolenz and Mike Nesmith — were cast as the stars of an NBC sitcom, “The Monkees” (1966-68), in which they performed and dealt with comic situations with a childlike irreverence, much as the Beatles had in their hit films “A Hard Day’s Night” and “Help!”