Robin Williams' Son Shares Emotional Update on What Would've Been His Dad's 74th Birthday originally appeared on Parade. Zak Williams, the eldest child of Robin Williams, shared a touching post in his father's honor on what would have been his 74th birthday.

Zak is the eldest son of Williams and his first wife, Valerie Velardi, whom he married in 1978 and divorced in 1988. Williams had two other children, daughter Zelda, 35, and son Cody, 33, from his second marriage to Marsha Garces Williams, which lasted from 1989 to 2010.