AP Photo/Timothy D. EasleyMuhammad Ali has been hospitalized with pneumonia and his "prognosis is good," his rep says.
The 72-year-old boxing legend, one of the most famous in the world, was taken to a medical center in an undisclosed location on Saturday. His rep said in a statement to E! News that he was diagnosed with a "mild case" of pneumonia.
"Muhammad Ali, who suffers from Parkinson's disease, is being treated by his team of doctors and is in stable condition," he said. "He was admitted earlier this morning and because the pneumonia was caught early, his prognosis is good with a short hospital stay expected."
"At this time, the Muhammad Ali family respectfully requests privacy," he added. "No further details are being released at this time."
The retired three-time world heavyweight champion was diagnosed with Parkinson's disease in 1984, at age 42. His ailment has no cure but can be controlled with medication.
Muhammad has appeared in public several times over the past few years. The boxing champ was joined by several family members when he received a star on the Hollywood Walk of Fame on Jan. 11, 2002. In September, he attended the Muhammad Ali Humanitarian Awards in his hometown of Louisville, Kentucky and received a lifetime achievement award.
(Pictured above: Back Row, from left, John Wooten, Jim Brown, Bill Russell, and Bobby Mitchell stand behind Muhammad Ali before the start of the 2014 Muhammad Ali Humanitarian Awards.)
He is also on Instagram.
Last month, two of his daughters, Maryum and Hana, debunked reports that said his health was deteriorating.
"He has never been on his deathbed," Maryum told BBC Sport. "He has Parkinson's, he has had it for 30 years and it is a progressive degenerative disease but he does well and is healthy outside the Parkinson's."
She said that their father "enjoys his life and he is clear-minded."
His Parkinson's has, however, affected his speech.
"In the morning he is at his best and he is talking clear and low and you can hear every word," Hana told BBC Sport. "It is too bad the world doesn't get to see that. As the day goes on, he gets more exhausted but he is not in any physical pain and is exactly the same person inside. Sometimes when you call him and his energy is low, he just make a clicking noise down the phone."
In 2013, daughter Laila Ali also debunked reports about her dad's health.
Muhammad, who was born Cassius Clay, won the Light Heavyweight gold medal at the 1960 Summer Olympic Games in Rome. He won the title of World Heavyweight Champion three times in the '60s and '70s. He retired from boxing in 1981, three years before his Parkinson's diagnosis.
—Reporting by Lindsay Good