'M*A*S*H' actor Alan Alda says he has Parkinson's disease

Actor Alan Alda revealed on Tuesday that he has been diagnosed with Parkinson’s disease.

The 82-year-old, who’s best known for his role as Army Capt. “Hawkeye” Pierce in the TV series “M*A*S*H,” shared the news on CBS, saying he was diagnosed three and a half years ago but only decided now to go public about it after seeing some of the disease’s physical effects progress.

“I’ve had a full life since then,” he said of the years since his diagnosis. “I’ve acted, I’ve given talks, I help at the Alda Center for Communicating Science at Stony Brook [University]. 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.”

Alan Alda through the years
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Alan Alda through the years
Alan Alda wearing helmet in a scene from the film 'M*A*S*H', Circa 1978. (Photo by 20th Century-Fox TV/Getty Images)
From left, American actors Alan Alda, as Captain Benjamin Hawkeye Pierce, Larry Linville (1939 - 2000), as Major Frank Burns, and Wayne Rogers, as Captain Trapper John McIntyre, in a scene from an episode of the television series 'MASH,' California, 1972. (Photo by CBS Photo Archive/Getty Images)
Jamie Farr, Loretta Swit, David Ogden Stiers, Harry Morgan, Mike Farrell, Alan Alda, and William Christopher in publicity portrait for the film 'M*A*S*H', Circa 1978. (Photo by 20th Century-Fox TV/Getty Images)
LOS ANGELES - JUNE 22: CBS television program Coronet Blue episode Six Months to Mars featuring Alan Alda (as Clay Breznia). Los Angeles, CA. Image dated June 22, 1965. (Photo by CBS via Getty Images)
Alan Alda talking to his right in a scene from the film 'The Moonshine War', 1970. (Photo by Metro-Goldwyn-Mayer/Getty Images)
Alan Alda as the surgeon Capt. Benjamin Franklin Pierce (Hawkeye) from the CBS sitcom M*A*S*H, California, 1973. (Photo by CBS Photo Archive/Getty Images)
LOS ANGELES, CA - MAY 17: (L-R) Brenda Vaccaro and Alan Alda on stage at the 28th Annual Primetime Emmy Awards on May 17, 1976 at The Shubert Theatre in Los Angeles, California (ABC via Getty Images)
375992 02: Actor Alan Alda Receives An Emmy Award 1979 In Los Angeles, Ca. Alda Gained International Acclaim For His Leading Role As Hawkeye Pierce On Twentieth Century Television's Hit Series M*A*S*H* Receiving An Unprecedented Number Of Awards For His Portrayal Of A Surgeon 'Temporarily Misassigned' To The Korean War. (Photo By John T. Barr/Getty Images)
NEW YORK, NY - 1979 Alan Alda and Meryl Streep in New York City, 1979. (Photo by Sonia Moskowitz/IMAGES/Getty Images)
NEW YORK, NY - CIRCA 1981: Alan Alda circa 1981 in New York City. (Photo by Robin Platzer/IMAGES/Getty Images)
Actor Alan Alda giving press conference for his television series MASH. (Photo by Time Life Pictures/DMI/The LIFE Picture Collection/Getty Images)
(L-R) Television talk show host Phil Donahue and wife, actress Marlo Thomas w. feminist writer/publisher Gloria Steinem and actor Alan Alda. (Photo by David Mcgough/DMI/The LIFE Picture Collection/Getty Images)
UNITED STATES - MARCH 06: Alan Alda (Photo by The LIFE Picture Collection/Getty Images)
Former star of television series 'Mash' and accomplished stage and screen actor and director, Alan Alda arrives at the Savoy Hotel in London, to attend the Evening Standard Awards lunch. (Photo by Martin Keene - PA Images/PA Images via Getty Images)
THE TONIGHT SHOW WITH JAY LENO -- Episode 206 -- Pictured: (l-r) Actor Alan Alda during an interview with host Jay Leno on April 12, 1993 -- (Photo by: Margaret Norton/NBC/NBCU Photo Bank via Getty Images)
Arlene Alda and Alan Alda during Post Opening Night Party for 'Jake's Women' at Columbia Bar & Grill in Hollywood, California, United States. (Photo by Ron Galella, Ltd./WireImage)
Alan Alda at the Graumann's Chinese in Los Angeles, California (Photo by Lester Cohen/WireImage)
Alan Alda arrives to the New York premiere of 'The Aviator' held at the Ziegfeld Theatre, New York City. (Photo by Brian ZAK/Gamma-Rapho via Getty Images)
NEW YORK CITY, NY - JANUARY 24: (L-R) Alan Alda, Arlene Alda, Tony Bennett and Susan Crow attend American Turkish Society, Alem Magazine, Mr. and Mrs. Ahmet Ertegun host a special Turkish evening with the Whirling Dervish Dancers at Metropolitan Museum of Art on January 24, 2005 in New York City. (Photo by Patrick McMullan/Patrick McMullan via Getty Images)
NEW YORK - MAY 22: Actor Alan Alda attends the 50th Annual Drama Desk Awards at Laguardia Concert Hall on May 22, 2005 in New York City. (Photo by Thos Robinson/Getty Images)
Marcia Cross and Alan Alda, presenters Best Performance by a Leading Actress in a Play (Photo by Stephen Lovekin/WireImage)
American actor Alan Alda on the set of Mad City directed by Greek Costa-Gavras (Photo by Murray Close/Sygma/Sygma via Getty Images)
THE WEST WING -- 'The Debate' Episode 7 -- Aired 11/06/2005 --Pictured: Alan Alda as Senator Arnold Vinick -- Photo by: Mitch Haddad/NBCU Photo Bank
THE WEST WING -- 'Message of the Week' Episode 3 -- Aired 10/09/2005 -- Pictured: Alan Alda as Senator Arnold Vinick -- Photo by: Mitch Haddad/NBCU Photo Bank
NEW YORK - DECEMBER 04: Actor Alan Alda and wife Arlene Alda sighting arriving at the Gramercy Park Hotel for the Dolce and Gabbana party to celebrate the opening of their flagship store on Madison Avenue on December 04, 2007 in New York City, New York. (Photo by Marcel Thomas/FilmMagic)
PARK CITY, UT - JANUARY 21: Actor Alan Alda on the street during the 2008 Sundance Film Festival on January 21, 2008 in Park City, Utah. (Photo by Scott Halleran/Getty Images)
Actor Alan Alda of 'MASH' talks onstage during the 7th Annual TV Land Awards held at Gibson Amphitheatre on April 19, 2009 in Universal City, California. (Photo by Chris Polk/FilmMagic)
30 ROCK -- 'Kidney Now!' Episode 322 -- Airdate 05/14/2009 -- Pictured: (l-r) Director of Photography Matt Clark, Alan Alda as Milton (Photo by Jessica Miglio/NBC/NBCU Photo Bank via Getty Images)
NEW YORK - JUNE 10: Actor Alan Alda attends the 2009 World Science Festival's Opening Gala at Alice Tully Hall on June 10, 2009 in New York City. (Photo by Mike Coppola/FilmMagic)
TODAY -- Pictured: (l-r) Kathie Lee Gifford, Alan Alda, Simon O' Rourke and Hoda Kotb appear on NBC News' 'Today' show -- (Photo by: Peter Kramer/NBC/NBC NewsWire via Getty Images)
NEW YORK, NY - JANUARY 01: Alan Alda and guest (L) attend the Portland Trail Blazers vs New York Knicks game at Madison Square Garden on January 1, 2013 in New York City. (Photo by James Devaney/FilmMagic)
NEW YORK, NY - JUNE 03: Alan Alda attends 69th Annual Theatre World Award Ceremony at The Music Box Theatre on June 3, 2013 in New York City. (Photo by Robin Marchant/Getty Images)
NEW YORK, NY - NOVEMBER 13: Actor Alan Alda (L) and Actress Candice Bergen attend the opening night celebration of 'Love Letters' at Brasserie 8 1/2 on November 13, 2014 in New York City. (Photo by Brent N. Clarke/Getty Images)
NEW YORK, NY - OCTOBER 04: Alan Alda attends the 53rd New York Film Festival - 'Bridge Of Spies' - Red Carpet Center on October 4, 2015 in New York City. (Photo by Rob Kim/Getty Images)
NEW YORK, NY - JULY 26: Arlene Alda and Alan Alda attends a Screening of Sony Pictures Classics' 'Equity' hosted by The Cinema Society with Bloomberg & Thomas Pink at TBD on July 26, 2016 in New York City. (Photo by Clint Spaulding/Patrick McMullan via Getty Images)
NEW YORK, NY - JUNE 02: Actor Alan Alda speaks during the 'Audio Publishers Association' panel at the BookExpo 2017 at Javits Center on June 2, 2017 in New York City. (Photo by John Lamparski/Getty Images)
NEW YORK, NY - OCTOBER 28: Gloria Steinem and Alan Alda attend the 2016 Hulaween Party Celebrating New York Restoration Project's 21st Anniversary at The Waldorf=Astoria on October 28, 2016 in New York City. (Photo by Michael Loccisano/Getty Images)
NEW YORK, NY - JULY 09: (EXCLUSIVE COVERAGE) (L-R) SiriusXM host/TV personality Hoda Kotb poses with actor Alan Alda during 'The Hoda Show' live on SiriusXM's TODAY Show Radio at the SiriusXM Studios on July 9, 2018 in New York City.�Photo by Astrid Stawiarz/Getty Images)

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  • This article originally appeared on HuffPost.
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