The other half of Duo Tal & Groethuysen. He began touring with Yaara Tal in 1985.
He was a student with Ludwig Hoffmann in Munich and Peter Feuchtwanger in London.
He and Tal were given many awards, including the Preis der Deutschen Schallplattenkritik, the Echo prize of the German Phono Academy, and the Cannes Classical Award.
He was born in Munich, the son of Herbert Groethuysen.
He and Tal recorded the seven-volume complete works for four-hand piano by Franz Schubert in the late nineties.