Grandparents, just like parents, come in all different shapes and sizes. The stereotypes of slow driving and a stash of Werther's Originals in the glove compartment have long since gone out the window.
This is even more so the case for those people who become grandparents very young. Of course, the younger a grandparent is the less likely it is they will conform to the stereotype of an aged, frail relative.
Check out this gallery to find out which celebrities became grandparents before turning 50.