Mark and his sister, Kris.Mark married actor Pam Dawber. They had 2 children. Sean-1988; Ty-1992. They've been married since 1987. Kris was married to Ricky Nelson. They had 4 children. They divorced..
Model/actress and fashion designer Elyse Knox was born today 12-14 in 1917. She married athletic/coach Tom Harmon and is the mom to actor Mark Harmon and Kris Nelson (Ricky Nelson's wife). She passed in 2012.