Question: What did the singer of "Moon River" in the movie Breakfast at Tiffany win a Tony for?

Knowledge 1: Moon River
``Moon River ''is a song composed by Henry Mancini with lyrics by Johnny Mercer. It was originally performed by Audrey Hepburn in the 1961 movie Breakfast at Tiffany's, winning an Academy Award for Best Original Song. The song also won the 1962 Grammy Awards for Record of the Year and Song of the Year. [SEP] Knowledge 2: List of awards and honours received by Audrey Hepburn
Audrey Hepburn received numerous awards and honors during her career. Hepburn won, or was nominated for, awards for her work in motion pictures, television, spoken - word recording, on stage, and humanitarian work. She was five - times nominated for an Academy Award, and was awarded the 1954 Academy Award for Best Actress for her performance in Roman Holiday and the Jean Hersholt Humanitarian Award in 1993, post-humously, for her humanitarian work. She won a record three BAFTA Awards for Best British Actress in a Leading Role, from five nominations, and received a Lifetime Achievement Award in 1992. Hepburn received 10 Golden Globe Award nominations, winning two, and was the recipient of the Cecil B. DeMille Award in 1990. She also won the 1954 Tony Award for Best Performance by a Leading Actress in a Play in Ondine, and received a Special Tony Award in 1968.
Knowledge 1: Moon River
``Moon River ''is a song composed by Henry Mancini with lyrics by Johnny Mercer. It was originally performed by Audrey Hepburn in the 1961 movie Breakfast at Tiffany's, winning an Academy Award for Best Original Song. The song also won the 1962 Grammy Awards for Record of the Year and Song of the Year. [SEP] Knowledge 2: Breakfast at Tiffany's (film)
Breakfast at Tiffany's is a 1961 American romantic comedy film directed by Blake Edwards and written by George Axelrod, loosely based on Truman Capote's 1958 novella of the same name. Starring Audrey Hepburn and George Peppard, and featuring Patricia Neal, Buddy Ebsen, Martin Balsam, and Mickey Rooney, the film was initially released on October 5, 1961 by Paramount Pictures.
Knowledge 1: Moon River
``Moon River ''is a song composed by Henry Mancini with lyrics by Johnny Mercer. It was originally performed by Audrey Hepburn in the 1961 movie Breakfast at Tiffany's, winning an Academy Award for Best Original Song. The song also won the 1962 Grammy Awards for Record of the Year and Song of the Year. [SEP] Knowledge 2: Tiffany Valentine
Chucky and Tiffany are brought back by their child when he reads the inscription on the Heart of Damballa. When they see he has no genitals (though he generally appears and sounds like a boy) Tiffany sees it as proof the child is a girl and names it Glenda (feminizing the name, Glen, which Chucky had given to him previously). Seed of Chucky focuses on their capers in Hollywood, where a movie is being made about their urban legend. Now going by ``Tiffany Ray '', Tiffany plans to transport her soul into the body of Jennifer Tilly (who happens to be playing her in the film). They also plan to impregnate her and put Glen / Glenda's soul in the baby's body. Their plan is successful, as Tilly swiftly gives birth to two babies, a boy and a girl. This works out perfectly as Glen / Glenda has a split personality: a sweet and caring boy, and a homicidal girl. However, Chucky decides to remain a doll, seeing that being human is n't so great. Disturbed by this, Tiffany leaves Chucky, taking Glen / Glenda with her, causing Chucky to get angry.

Answer: for Best Performance by a Leading Actress in a Play in Ondine