Patrick Beattie Mynhardt (12 June 1932, Bethulie, Free State, South Africa - 25 October 2007 London, England) was a well known South African film and theatre actor of Irish and German ancestry. He appeared in over 150 stage plays in South Africa and England, 100 local and international films, TV plays and serials as well as an opera. He died in London where he was performing in his one-man show Boy from Bethulie at the Jermyn Street Theatre in the West End.

The son of Johannes Tobias Mynhardt, a district surgeon and Elizabeth Beattie, an Irish emigrant, Patrick was born in Bethulie in the Free State.