Tracy Kristine Nelson (born October 25, 1963) is an American actress and writer.
Nelson was born in Santa Monica, California. She is a fourth-generation performer. Her great-grandparents were vaudeville performers Hazel Dell (née McNutt) and Roy Hilliard Snyder. Their daughter was her paternal grandmother Harriet Nelson, the star of the long-running sitcom The Adventures of Ozzie and Harriet. Her parents were Rock and Roll Hall of Fame inductee Ricky Nelson and actress/artist Kristin Nelson (née Harmon). She has three younger siblings: Matthew Nelson, Gunnar Nelson of the 1990s rock group Nelson, and Sam Nelson. Her paternal grandparents are Ozzie and Harriet Hilliard Nelson, whose long running television show The Adventures of Ozzie and Harriet is represented in the Smithsonian Museum in Washington, D.C. Nelson's maternal grandparents are Tom Harmon, a Heisman Trophy winner from the University of Michigan, and actress Elyse Knox. She is also the niece of actors David Nelson, and her mother's siblings Mark Harmon and Kelly Harmon.