John M. Frame is a retired American Christian philosopher and Calvinist theologian especially noted for his work in epistemology and presuppositional apologetics, systematic theology, and ethics. He is one of the foremost interpreters and critics of the thought of Cornelius Van Til.
An outstanding theologian, John Frame distinguished himself during 31 years on the faculty of Westminster Theological Seminary, and was a founding faculty member of WTS California. He is best known for his prolific writings including ten volumes, a contributor to many books and reference volumes, as well as scholarly articles and magazines.
Dr. Frame is also a classically trained musician (he plays the piano and organ) and a critic of film, music, and other media. He has been involved in the music/worship ministry of the church since he was a teenager, upon coming to faith in Christ. He is deeply committed to the work of ministry and training pastors (srouce: Mongergism.com).