Parkinson hosted his eponymous talk show from 1971 to 1982 on BBC1, and then again from 1998 to 2007. In 2004, “Parkinson” moved from BBC1 to ITV. Over the course of the show’s run, Parkinson interviewed guests like Paul McCartney, Muhammad Ali, George Michael, Madonna, Fred Astaire, Orson Welles and Mel Gibson. By his own estimation, Parkinson interviewed 2,000 celebrities during his career.
Source: Michael Parkinson Dead: U.K. Talk Show Host Was 88 – Variety