Heather Donahue is an American actress and author, best known for her role as one of the main characters in the 1999 horror film The Blair Witch Project. The film became a cultural phenomenon and is credited with popularizing the found-footage genre in cinema. In addition to her acting career, Donahue has written a memoir titled Growgirl, which details her experiences in the cannabis industry. She has also appeared in various television shows and films, showcasing her versatility as an actress beyond her breakout role.