Michael Sinelnikoff (born 1 August 1928) is a British-Canadian actor, director, producer, and writer. He is known for his role as Professor Arthur Summerlee on the television series Sir Arthur Conan Doyle's The Lost World,^[1] and has been seen in a variety of film roles such as 300^[1] and The Greatest Game Ever Played.^[1]

Sinelnikoff was born in London, England, and is of mixed Russian, French, and German descent. He graduated from Higher Schools Certificate in Modern Languages, with Distinction in French and German language and literature in 1950. Sinelnikoff later attended the Royal Academy Of Dramatic Art in London; Italia Conti Stage School, London, UK; and Carleton College (University), Ottawa, Canada.

Sinelnikoff's acting credits include portraying Professor Summerlee in two separate adaptations of Sir Arthur Conan Doyle's novel The Lost World.

In 1984, Sinelnikoff became the first Director of Quebec's International Cirque du Soleil. His other non-acting credits include producing and directing 68 television dramas for CBC Montreal's Teleplay series and writer for CBC television series Festival drama: "The Spirit of the Deed".^[2] He has also served as a director at national theaters and festivals including Montreal's Centaur Theatre and Saidye Bronfman Theatre, and The Piggery Theatre in North Hatley, Quebec.^[3]