Betty White says the secret to a long life is a "sense of humour"

She said: "I don't like the other side. The positive side is a lot more fun. A sense of humour [keeps me going]. Don't take yourself too seriously. You can lie to others - I wouldn't - but you can't lie to yourself. Again, having a sense of humour. Just looking at the positive side and not dwelling on the downside. Takes up too much energy being negative. Also having a good agent who keeps me busy all the time."

And Betty feels very "blessed" to have good health.

She added to People magazine: "I am blessed with good health so turning 99 is no different than turning 98 ... [I can't wait] to be back visiting with close friends and bringing food to my animal friends."

Back in 2018, Betty received a standing ovation at the Primetime Emmy Awards, where she spoke about being dubbed as the "First Lady of television" as she made a special statement.

She said: "Somebody said something the other day about first lady of television, and I took it as a big compliment. And then I heard her talking to her daughter a little later, and she said, 'First lady, she's that old. She was the first one way back.' Little did I dream then, that I would be here and it's incredible that I'm still in this business and that you are still putting up with me. I am thanking you. It's incredible that you can stay in a career this long and still have people put up with you. I wish they did that at home."