Kathryn Cok was born in New York. She began her harpsichord studies in 1996 with Jacques Ogg in the Royal Conservatory in The Hague, Holland. From 1998 on she studied there with Ton Koopman and Tini Mathot, graduating with a Masters degree in 2002.

Kathryn was harpsichordist in the European Union Baroque Orchestra in 1999, and in 2001 won first prize in the Early Music Competition for voice, organ and Harpsichord in Brunnenthal, Austria. She has worked with orchestras such as the Amsterdam Baroque Orchestra, Musica ad Rhenum and other ensembles specializing in the performance of early music in Europe and North America.

Kathryn is also active as a forte pianist, and performs regularly with the Etesian Ensemble in England, which specialize in the classical repertoire for piano and winds.