The entertainment world is reacting to the death of legendary crooner Tony Bennett.

Bennett, who rose to fame in the 1950s and was still dazzling audiences in recent years thanks to collaborations with Lady Gaga, "passed away in his hometown of New York City" Friday morning, according to a statement from his publicist provided to ABC News.

The "I Left My Heart in San Francisco" singer, who won 20 Grammys and was named a Kennedy Center Honoree in 2005, was 96. He had been battling Alzheimer's disease since 2016.

Keep scrolling to see tributes for Bennett from across the entertainment industry:

Nile Rodgers: "My most heartfelt condolences go out to Tony Bennett's family and friends. They're also my emotional family and friends."

Keith Urban: "Just heard about the great Tony Bennett passing. What a legacy of not only superb timeless music, but a class act study in cool, grace, and elegance."

George Takei: "The great Tony Bennett has passed away at the age of 96. He was the last of his kind, a master of the American songbook. He may have left his Heart in San Francisco, but he won all of our hearts, from Sinatra to Lady Gaga. Be at peace, and sing to us now from the stars, Tony."

Gene Simmons: "Today we lost an icon of icons. Kind, considerate and as Sinatra was quoted as saying, the best singer of them all. Rest In Peace, Tony Bennett."

Josh Gad: "This one shouldn’t sting so much because any of us would take 96 years, but man is it hard to imagine a world without the great Tony Bennett. ????"