Melissa Sue Anderson (born September 26, 1962) is an American actress best known as Mary Ingalls of TV's famous series Little House on the Prairie.

Anderson was born in California and began her career in a number of small television roles. At 12 years of age, she won her role in Little House on the Prairie out of hundreds of competitors. After the popular series ended in 1980, she continued her acting in several TV shows, such as The Equalizer, Alfred Hitchcock Presents, and Murder, She Wrote.