Biography Gunnar Eric Nelson (born September 20, 1967 in Santa Monica, California) is an American musician, singer, and songwriter and international multi-platinum recording artist. Gunnar is the son of teen idol Ricky Nelson and actress Kristin Harmon. He is the identical twin brother of musician Matthew Nelson and brother of Tracy Nelson and musician Sam Nelson. His paternal grandparents are Ozzie Nelson and Harriet Hilliard from the TV series Ozzie and Harriet. His maternal grandparents are football player and sports broadcaster Tom Harmon and the 1940s "B" movie actress Elyse Knox.