Alan Alda

The M*A*S*H actor revealed in 2018 that he had been diagnosed with Parkinson's three years earlier, later explaining that he had been doing a lot of "crazy things" to try and stave off the condition.

Confirming news of his diagnosis on Twitter, the 90-year-old star wrote: "I decided to let people know I have Parkinson's to encourage others to take action.

"My life is full. I act, I give talks, (and) I do my podcast, which I love. If you get a diagnosis, keep moving!"