Mildred J. Hill (June 27, 1859 - June 5, 1916) was an American songwriter, who composed the melody for "Good Morning to All", later used as the melody for "Happy Birthday to You".
Mildred J. Hill, born in Louisville, Kentucky, was the oldest of three sisters, Mildred, Patty, and Jessica. She learned music from her father, Calvin Cody, and Adolph Weidig.
Mildred Hill was a kindergarten and Sunday-school teacher, like her younger sister Patty. She moved into music, teaching, composing, performing, and specializing in the study of Negro spirituals. Hill and her sister were honored at the Chicago World's Fair for their work in the progressive education program at the experimental kindergarten, the Louisville Experimental Kindergarten School.