Stephen Joshua Sondheim (March 22, 1930 – November 26, 2021) was an American composer and lyricist. One of the most important figures in 20th-century musical theater, Sondheim was praised for having "reinvented the American musical" with shows that tackled "unexpected themes that range far beyond the [genre's] traditional subjects" with "music and lyrics of unprecedented complexity and sophistication." His shows addressed "darker, more harrowing elements of the human experience," with songs often tinged with "ambivalence" about various aspects of life.
Sondheim's best-known works as composer and lyricist include A Funny Thing Happened on the Way to the Forum (1962), Company (1970), Follies (1971), A Little Night Music (1973), Sweeney Todd: The Demon Barber of Fleet Street (1979), Sunday in the Park with George (1984), and Into the Woods (1987). He was also known for writing the lyrics for West Side Story (1957) and Gypsy (1959).