Alan Alda hopes he can help to destigmatize Parkinson's disease

He told the 'Today' show: "I'm doing great and I hope the world is not saddened because the whole idea of talking about it was to try to help people lose this stigma.

"It's hard to keep a secret, especially if your hands shake or if you other symptoms."

Alan explained that in spite of the challenges he's facing, he' still "doing very well".

He continued: "It's much more easy to live your life if you just frankly say, 'Yeah, I have got Parkinson's and I'm working on it' - I am working on it and doing very well."

In July, Alan revealed he was diagnosed with the disease three-and-a-half years ago, but said he wanted to be open about his diagnosis before someone did a "sad" story on him.

He shared: "I was diagnosed three-and-a-half years ago and I've had a full life since then.

"I've acted, I've given talks, I help at the Alda Center for Communicating Science at Stony Brook. I started this new podcast. And I noticed that - I had been on television a lot in the last couple of weeks talking about the new podcast - and I could see my thumb twitch in some shots and I thought, it's probably only a matter of time before somebody does a story about this from a sad point of view, but that's not where I am."