John Blackman is an Australian radio and television presenter, voice-artist and comedy writer and author. He is most widely known for his voice-over work for the long-running Nine Network comedy variety show Hey Hey It's Saturday from 1971 until 1999 and then returning for the reunion specials in 2009 and in 2021, with a brief relaunch in 2010.

Hey Hey It's Saturday was a long-running variety television program on Australian television. It initially ran for 28 years on the Nine Network from 9 October 1971 to 20 November 1999, with a recess in 1978. Its host throughout its entire run was Daryl Somers, who later also became executive producer of the program. The original producer, Gavan Disney, left the program in December 1990 and Somers then formed a production company, Somers Carroll Productions, with comedy writer and on-screen partner Ernie Carroll, the performer of Somers' pink ostrich puppet sidekick Ossie Ostrich. Carroll retired in 1994, and Ossie was no longer featured in the show.