Helen Smith Woodruff (June 7, 1888 – October 14, 1924) was an American author, playwright, and philanthropist.

She set most of the stories in her native Southern United States and donated the proceeds from most of her books to charities.

[1][2] In 1918, she wrote the musical comedy play, Hooray for the Girls while living in Ash Grove, her summer home in Litchfield, Connecticut.

According to Cait Miller at the Library of Congress, the play "may well have been the first full-length Broadway musical authored entirely by women".

[7][8] Mrs. Woodruff was also a joint author in the libretto "Cash and Kisses.” She also contributed poems and short stories for magazines and wrote lyrics for several songs.