Happy 91st Birthday, Betty White! 16 Sizzlin' Seniors on TV (PHOTOS)

Though Hollywood certainly isn’t known for treasuring its elders, lots of actors manage to hang in there past “a certain age.” And the truly great never seem to expire. Among them is everyone's favorite nonagenarian, Betty White. To celebrate the comedic actress's 91st birthday, on January 17, we've compiled a list of 16 celebrity seniors whose TV careers are still going strong.