Peter Talbot Westergaard (b. 1931) is an American composer and music educator known for his contributions to contemporary classical music. He primarily works within the realms of avant-garde and modern classical genres. Westergaard's notable works include operas such as "The Tempest" (1982), based on Shakespeare's play, and "The Last Days of Judas Iscariot" (2005), which showcases his ability to blend traditional operatic elements with contemporary themes. Westergaard's impact on music extends beyond composition; he is also recognized for his role in music education, having taught at institutions like the University of Wisconsin-Madison and the University of Minnesota. His pedagogical approach has influenced a generation of composers, encouraging innovation and exploration within the field. His compositions often explore complex themes and utilize unconventional structures, reflecting a deep engagement with both musical tradition and contemporary issues. Through his work, Westergaard has contributed to the evolution of American opera and contemporary art music, making him a significant figure in the landscape of 20th and 21st-century classical music.