Kenneth Colster Blackburn MNZM (born 1935) is a New Zealand actor and writer. He has worked in film, television, radio and theatre in New Zealand, Australia, and the United Kingdom since 1972.

In an impressively wide-ranging career spanning more than 40 years Ken has worked in film, television, radio and theatre. Ken has appeared in many of New Zealand’s most iconic TV shows including Xena: Warrior Princess, Farscape, Close To Home, Gliding On and Shortland Street. His film credits include pioneering feature Skin Deep, The Frighteners, King Kong and Rest for the Wicked. Ken’s stage credits are also extensive. In 1999 his performance as Vladimir in Waiting for Godot earned him the Best Actor award at the Chapman Tripp Theatre Awards. In 2005 he was awarded the Queen's Birthday Honours List for Services to the Performing Arts. Ken most recently performed in Circa Theatre’s 2017 production of Three Days in the Country. As well as his successful career as an actor in New Zealand, the UK and Australia, Ken has also directed stage, film, television and radio productions. His autobiographical book Blitz Kids was published by the BBC in 1995.