Katie Cassidy revealed the actor's final words on Twitter Friday. Katie Cassidy and David Cassidy arrive at the 9th annual Family Television Awards held at the Beverly Hilton Hotel, Nov. 28, 2007 ...

David Cassidy attends Seminole Hard Rock Winterfest Boat Parade 2014 Grand Marshal Reception Honors Flo Rida, Dec. 12, 2014 in Hollywood, Fla. Larry Marano/Getty Images, FILE — -- Actor David ...

An audience of young pop fans at a David Cassidy concert at White City Stadium, west London. (Photo by Evening Standard/Getty Images) The single “I Think I Love You,” featuring Cassidy on lead ...

(Photo by Rick Diamond/Getty Images for IEBA) FORT LAUDERDALE, Fla. — David Cassidy, the wildly popular ’70s heartthrob who shot to fame when he starred and sang in TV’s “The Partridge ...

David Cassidy from Season 2 of 'The Partridge Family' in 1971. Credit: ABC via Getty Images David Cassidy, who became famous in the 1970s playing Keith Partridge on The Partridge Family ...