The twice-divorced Ford, 62, is currently dating "Ally McBeal" star Calista Flockhart, 40, and is described as "healthy, hip and having fun" in a readers' poll.
Ford has four children and one grandchild.
Others in the list of top 10 hottest grandparents are Paul McCartney, 62; Goldie Hawn, 59; Pierce Brosnan, 51; Mick Jagger, 61; singer Naomi Judd 58; Priscilla Presley, 59; rocker Steven Tyler, 56; Tina Turner, 65; and Sally Field, 58.
Megyn Kelly: Santa Claus and Jesus are both white men
Costly malfunction causes beer flood at Boston-area brewery