Hello, Dolly! is a 1964 musical with lyrics and music by Jerry Herman and a book by Michael Stewart, based on Thornton Wilder's 1938 farce The Merchant of Yonkers, which Wilder revised and retitled The Matchmaker in 1955. The musical follows the story of Dolly Gallagher Levi, a strong-willed matchmaker, as she travels to Yonkers, New York to find a match for the miserly "well-known unmarried half-a-millionaire" Horace Vandergelder.

Hello, Dolly! was first produced on Broadway by David Merrick in 1964, winning 10 Tony Awards, including Best Musical. This set a record which the play held for 37 years. The show album Hello, Dolly! An Original Cast Recording was inducted into the Grammy Hall of Fame in 2002. The album reached number one on the Billboard album chart on June 6, 1964, and was replaced the next week by Louis Armstrong's album Hello, Dolly! Louis Armstrong also was featured in performances of the show on Broadway to perform a small part of the song "Hello, Dolly!".

The show has become one of the most enduring musical theater hits, with four Broadway revivals and international success. It was also made into the 1969 film Hello Dolly! which won three Academy Awards, and was nominated in four other categories.

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