Leonard Bernstein August 25, 1918 – October 14, 1990 was an American composer, conductor, author, music lecturer, and pianist. He was among the first conductors born and educated in the United States of America to receive worldwide acclaim.
His fame derived from his long tenure as the music director of the New York Philharmonic, from his conducting of concerts with most of the world's leading orchestras, and from his music for West Side Story, Peter Pan, Candide, Wonderful Town, On the Town, On The Waterfront, his Mass, and a range of other compositions, including three symphonies and many shorter chamber and solo works.
Bernstein was the first conductor to give numerous television lectures on classical music, starting in 1954 and continuing until his death. He was a skilled pianist, often conducting piano concertos from the keyboard.
As a composer he wrote in many styles encompassing symphonic and orchestral music, ballet, film and theatre music, choral works, opera, chamber music and pieces for the piano. Many of his works are regularly performed around the world, although none has matched the tremendous popular and commercial success of West Side Story.