The comedic actress said she feels "so good and energetic" and feels lucky to still be working at her age.
"There's no spare time, so I'm active all the time. I think that forces you to stay well. To be 90 ... and still be working -- that's what I wouldn't have expected. I'm the luckiest broad," she told People magazine.
"I should follow better eating health rules," the "Hot in Cleveland" star said. "But hot dogs and Red Vines and potato chips and french fries are my favorite foods." Red Vines are California-produced red licorice.
While White may not actively hit the gym, she said she still gets enough exercise.
"I have a two-story house and a very bad memory," she joked. "I'm up and down those stairs all the time."