Following Brett Favre's Parkinson's diagnosis, here are other athletes, actors and singers who have faced the disease

On Tuesday, Green Bay Packers legend Brett Favre revealed that he was recently diagnosed with Parkinson's disease .

The Pro Football Hall of Fame quarterback shared the news during testimony before a congressional committee investigating the misuse of federal welfare funds .

Parkinson's is an incurable movement disorder of the nervous system that worsens over time, according to the Mayo Clinic . Symptoms can include tremors, slowed movement, rigid muscles, poor posture and balance, loss of automatic movements, speech changes, writing changes and nonmotor symptoms.

According to a previous Journal Sentinel report , a person who has suffered brain injuries like concussions, something Favre said he experienced throughout his 20-year NFL career, has a greater likelihood of developing Parkinson's, a recent study revealed.

Farve is far from alone in his Parkinson's fight. Several prominent figures from all walks of life — including actors, singers and fellow athletes — have been diagnosed with the disease over the years.

Here are a few of those people and their stories:

Award-winning actor, author and advocate Michael J. Fox

Award-winning actor, author and advocate Michael J. Fox has been living with Parkinson's for over three decades.

Fox has been on several TV shows, such as "Family Ties" and "Spin City," and starred in films, including the "Back to the Future" trilogy, "Casualties of War," "The Secret of My Success" and "Teen Wolf." He was also the voice of "Stuart Little," Milo in "Atlantis: The Lost Empire" and Chance in "Homeward Bound: The Incredible Journey."

Fox has had 18 Emmy nominations and five wins , 13 Golden Globe nominations and four wins , three Grammy nominations and one win , two Screen Actors Guild Awards and a People’s Choice Award. He's also a New York Times best-selling author.

Fox was diagnosed with Parkinson's in 1991 and publicly shared his diagnosis seven years later, in 1998.

In 2000, Fox launched The Michael J. Fox Foundation for Parkinson’s Research . In 2022, he was presented with an honorary Oscar, the Jean Hersholt Humanitarian Award, by the Academy of Motion Picture Arts and Sciences, according to his foundation's website .

In 2023, "Still: A Michael J. Fox Movie " — a documentary that traces Fox's life, career and how he used alcohol to cope with his diagnosis — premiered at Sundance Film Festival and was nominated for a BAFTA .

While Fox stepped away from acting in 2020 due to memory loss, a symptom of Parkinson's, he told Entertainment Tonight earlier this year that he would consider returning if "something came up that I could put my realities into it, my challenges, if I could figure it out."

Green Bay Packers great Forrest Gregg

Former Green Bay Packers player and coach Forrest Gregg — whose association with professional football spanned six decades — was diagnosed with Parkinson's in 2011. He died in 2019 at age 85.

Gregg — who had a 15-season playing career — was one of the best offensive linemen of his era. He played in a then-NFL record 88 straight games from 1956 to 1971. He was named all-NFL for eight straight years and played in nine Pro Bowls. He was a part of seven NFL championship teams and won three Super Bowls — two with the Packers and one with the Dallas Cowboys.

He coached the Packers, Cincinnati Bengals and Cleveland Browns. He also coached at Southern Methodist University and in the Canadian Football League.

He was a Pro Football Hall of Famer and was named to the NFL's 75th anniversary team.

Gregg attributed his Parkinson's to all the concussions he suffered as a football player. But, having battled intestinal cancer and melanoma over the course of his life, he didn't view the diagnosis as a death sentence .

Gregg remained active in his later years, spent in Colorado Springs. He didn't try to hide his condition and he spent the latter years of his life speaking to as many people as possible about the challenges of the disease and ways to combat it.

Boxing legend Muhammad Ali

Muhammad Ali, widely hailed as the greatest heavyweight boxer in the sport’s history, lived with Parkinson's for over 30 years. He died at age of 74 in 2016 after being hospitalized a day earlier with a respiratory issue.

Ali won Olympic gold in 1960. He was one of the youngest heavyweight champions of all time and would go on to be the first fighter to win the heavyweight title three times.

Outside the ring, his personality and social activism also made him one of the most recognizable sports figures of the last century.

Ali retired from boxing in 1981 with a 56-5 record, three of the losses coming in his final four fights. He had 37 knockouts.

Ali was diagnosed with Parkinson's disease three years after his retirement. Family members believed his years of boxing contributed to the disease. After his retirement, he concentrated on philanthropy and social activism.

Award-winning singer-songwriter Neil Diamond

Just ahead of his 77th birthday in 2018, "Sweet Caroline" superstar Neil Diamond announced he had Parkinson's and that he would be retiring from touring .

Diamond had 37 Top 40 hits , including three No. 1s: "Cracklin' Rosie," "Song Sung Blue" and "You Don't Bring Me Flowers." His other popular songs include “Hello Again,” “Forever in Blue Jeans,” “Love on Rocks,” “I Am … I Said" and "September Morn."

As of 2011, Diamond had sold 128 million records, according to reports.

Over the years, Diamond received 13 Grammy nominations and one win. He was also nominated for four Golden Globes, winning one. In 2011, he was the recipient of the Billboard Icon Award after being a force on the charts for decades . He was inducted into both the Rock and Roll Hall of Fame and the Songwriters Hall of Fame.

Since retiring from the road, Diamond has given several surprise performances , including on opening night of his Broadway show, "A Beautiful Noise," in 2022.

According to a 2023 USA TODAY interview , Diamond was still continuing to find joy through music.

Award-winning rocker, former Black Sabbath frontman Ozzy Osbourne

"Crazy Train" singer Ozzy Osbourne — former frontman of Black Sabbath — suffered from tremors and was diagnosed with Parkin Syndrome in the early 2000s. He revealed in 2020 that he had been diagnosed with Parkinson's disease.

Black Sabbath rose to global glory on the back of five platinum and three gold albums. Before being fired in 1979 for substance abuse, the Prince of Darkness recorded several albums with the band, including "Sabbath," "Paranoid" and "Master of Reality."

Osbourne went on to have a groundbreaking solo career, with albums including "Blizzard of Ozz" and "Diary of a Madman." His Rock and Roll Hall of Fame bio calls him "one of the most successful solo artists of all time." He dropped his latest album, Patient Number 9, in 2022.

Osbourne has 12 total Grammy nominations and five wins . Between his solo career and his time with Black Sabbath, he sold over 100 million records worldwide .

Osbourne also starred in the explosive MTV reality show "The Osbournes" alongside his family, including wife and TV personality Sharon.

In 2013, Osbourne would get back with Black Sabbath for their 1998 "Reunion" live album and 2013 studio album "13." Earlier this summer, Forbes reported the possibility of the band performing a final reunion show.

Civil rights leader Rev. Jesse Jackson

Civil rights leader Rev. Jesse Jackson was diagnosed with Parkinson's in 2015 and publicly announced the news two years later .

Jackson emerged as a prominent voice in the civil rights movement in the 1960s. The Rev. Dr. Martin Luther King Jr. gave Jackson a role in the Southern Christian Leadership Conference and charged him with establishing a presence for the organization in Chicago.

While Jackson was unsuccessful in his two runs for the Democratic presidential nomination, he was only the second Black American to seek a major-party nomination for pr e sident , running as a Democrat, and was the first Black politician to win any major-party state primary contest .

The ordained minister organized the civil rights organizations Operation PUSH and the Rainbow Coalition. Last year, Jackson stepped down as president of the Rainbow PUSH Coalition.

Jackson served as an envoy to U.S. presidents, negotiating the release of a Navy pilot with Syrian president Hafez al-Assad and persuading Saddam Hussein to release several British and American citizens being held as "human shields" ahead of the 1991 Persian Gulf War. He received the Presidential Medal of Freedom from President Bill Clinton.

He's been outspoken about police brutality in black and Latino communities, and has pushed Silicon Valley executives to diversify their workforce.

This summer, Jackson attended the Democratic National Convention in Chicago and received a standing ovation upon his arrival.

Award-winning actor, director and screenwriter Alan Alda

Award-winning television, film and Broadway actor Alan Alda revealed he's living with Parkinson's in 2018, 3½ years after receiving his diagnosis.

Alda is best-known for his portrayal of Captain Benjamin Franklin "Hawkeye" Pierce in "M*A*S*H." He was also in "The West Wing," "White Mile," "Clubland," "Ray Donovan," and made appearances on "30 Rock," "The Big C" and "The Blacklist."

Alda was in several films, including "Same Time Next Year," "California Suite," "The Seduction of Joe Tynan," "Everyone Says I Love You," "Crimes and Misdemeanors," "Manhattan Murder Mystery," "The Aviator," "What Women Want" and "Bridge of Spies."

He wrote, directed and starred in "Betsy's Wedding," "A New Life," "Sweet Liberty" and "The Four Seasons."

He has had 34 Emmy nominations and six wins , 16 Golden Globe nominations and six wins, and was nominated for three Tony Awards.

Eevangelist Billy Graham

The Rev. Billy Graham, the world's best-known evangelist, was diagnosed with Parkinson's in 1989. After his symptoms didn't progress like others with the disease, his diagnosis was revised to focus on the effects of hydrocephalus, according to a USA TODAY report .

Graham died at age 99 in 2018.

Graham traveled the globe for almost six decades , bringing countless people to Christ with his charisma and plainspoken message about the gospel.

He had the ear of many powerful world leaders, including U.S. presidents and Queen Elizabeth II. His crusades, or preaching tours, drew thousands. His final crusade in 2005 drew 242,000 people to New York City.

Over the years, Graham was awarded the Congressional Gold Medal with his wife, Ruth; the Presidential Medal of Freedom; the Templeton Foundation Prize for Progress in Religion; and was presented with an honorary knighthood by the British Empire.

USA TODAY contributed to this report.

This article originally appeared on Milwaukee Journal Sentinel: Following Brett Favre's Parkinson's diagnosis, here are other athletes, actors and singers who have faced the disease