Crackerjack is a British children's television series which was initially aired on the BBC Television Service between 14 September 1955 and 21 December 1984 (with no series in 1971). The series was a variety show featuring comedy sketches, singers and quizzes, broadcast live with an audience.

Crackerjack returned in 2020. It was hosted by Sam & Mark, with an exclamation mark added to its original title, and aired on CBBC from 17 January. The second revived series aired from December 2020 to March 2021.

Its initial long run featured Eamonn Andrews, Max Bygraves, Leslie Crowther, Ed "Stewpot" Stewart, Jack Douglas, Stu Francis, Peter Glaze, Don Maclean, Michael Aspel, Little and Large, Jan Hunt, The Krankies, Basil Brush, Geoffrey Durham, Bernie Clifton, and Ronnie Corbett, amongst many others.

Performers who appeared as singers/dancers, assisting the host with games, included Sally Ann Triplett (Series 26), Julie Dorne-Brown (Series 27–28), and Ling Tai (Series 29).