According to Lincoln Center, Fellner is unable to perform because of illness.
Biss, making his Mostly Mozart debut, will perform Mozart's Piano Concerto No. 20 with the Mostly Mozart Festival Orchestra, conducted by Louis Langr_e. The program also includes Mozart's Mass in C minor, with soprano Sandrine Piau, mezzo-soprano Tove Dahlberg, tenor Gregory Turay, and the Russian Patriarchate Choir and Concert Chorale of New York.
A member of a musical family—his grandmother was cellist Raya Garbousova and his parents are violinists Miriam Fried and Paul Biss—Biss studied with Leon Fleisher at the Curtis Institute. He made his New York recital debut at the 92nd Street Y in 2000 and has performed with the New York Philharmonic, San Francisco Symphony, and Pitsburgh Symphony. His first recording, a collection of Schumann and Beethoven, was released by EMI in April.