At the age of 7, Keller began playing the instrument and seven years later was admitted to the Liszt Academy of Music, where his teachers were Dénes Kovács, György Kurtág, and Ferenc Rados.
In 1983, Keller won the Hubay Violin Competition, after which he received an invitation from János Ferencsik to become the National State Orchestra's leader.
Throughout the years, he has performed with Heinz Holliger, Ralph Kirshbaum, Gidon Kremer, Mstislav Rostropovich, Kim Kashkashian, among many others.
Keller has been performing György Kurtág's works worldwide and conducted the Orchestra di Padova e del Veneto in 2013.
[1] András Keller is a regular guest professor of the International Musicians Seminar Prussia Cove and the Aix-en-Provence Festival.