(CNN) Frank Sinatra Jr., the son of the legendary entertainer who had a long musical career of his own, died Wednesday, said manager Andrea Kauffman.

He was 72.

Kauffman said Sinatra died at a Daytona Beach, Florida, hospital. Singer Nancy Sinatra said on her Facebook page that her brother died of cardiac arrest.

"Sleep warm, Frankie..." she wrote.

Sinatra was on his "Sinatra Sings Sinatra" tour and was scheduled to perform at the Peabody Auditorium on Wednesday. An announcement on the venue's Facebook page said the singer had taken ill.

Photos: Sinatra: Singer, actor, showman Photos: Sinatra: Singer, actor, showman Frank Sinatra was called, simply, "The Voice." But his prized pipes only told part of the story. Sinatra was also an Oscar-winning actor, a shrewd judge of songcraft and a champion showman. "Sinatra: The Photographs" captures the man through the years as he went from teen idol to world-renowned artist. Here, he rehearses for "The Frank Sinatra Timex Show" in October 1959. Hide Caption 1 of 12 Photos: Sinatra: Singer, actor, showman Always blessed with a gorgeous voice, Sinatra also knew how to make the best of it. (He purchased a microphone while still in his teens to practice his sound.) After years with various bands, Sinatra broke out in the 1940s as a teen idol. Here, kissing fans swarm Sinatra for autographs in 1943. Hide Caption 2 of 12 Photos: Sinatra: Singer, actor, showman After his 1940s success, Sinatra's career hit the skids in the early '50s. He was dropped by his movie studio and clashed with his record label, and he had split with his wife to marry actress Ava Gardner. His performance in 1953's "From Here to Eternity," for which he won an Oscar for best supporting actor, was his comeback. Here, Sinatra shares a much-needed laugh with co-stars Burt Lancaster, Ernest Borgnine and Mickey Shaughnessy in between takes of one of the movie's tensest scenes. Hide Caption 3 of 12 Photos: Sinatra: Singer, actor, showman Sinatra also re-established his singing career with a new label, Capitol Records, for which he would record some of his greatest sides. His insouciant look -- loosened tie, tailored jacket, fedora angled just so -- became a trademark. Hide Caption 4 of 12 Photos: Sinatra: Singer, actor, showman As an actor, Sinatra was willing to take on some tough roles. In 1955's "The Man with the Golden Arm," he plays a heroin-addicted drummer and card dealer trying to go straight. In this image, he holds a match up to his dilated eyes, right before a scene in which Kim Novak's character does the same to him, checking to see if he's still using. Sinatra's performance earned him a best actor Oscar nomination. Hide Caption 5 of 12 Photos: Sinatra: Singer, actor, showman In 1958's "Kings Go Forth," Sinatra co-starred with Tony Curtis as a pair of World War II soldiers who get involved with the same woman (Natalie Wood) while stationed in France. Hide Caption 6 of 12 Photos: Sinatra: Singer, actor, showman Sinatra soon became well known for his adventures with the "Rat Pack," a group of high-living friends that included Sammy Davis Jr., Peter Lawford and Dean Martin. The gang was closely associated with Las Vegas, where they performed and where Sinatra had a steam room built for the Sands Hotel. Here, Sinatra (on the phone) is joined in 1960 by Lawford, left; Davis, lying on the bench; and banker Al Hart. Hide Caption 7 of 12 Photos: Sinatra: Singer, actor, showman Perhaps Sinatra's most fruitful musical collaboration was with arranger Nelson Riddle. They recorded the albums "In the Wee Small Hours" and "Only the Lonely," among others. Here, Sinatra records his 1961 album, "Sinatra's Swingin' Session!!!" in Capitol Records' Studio A. Riddle stands on the left. Hide Caption 8 of 12 Photos: Sinatra: Singer, actor, showman Sinatra's adventures with the "Rat Pack" were legendary. The singer was regularly in the entertainment headlines, and he fostered some of them with good humor. Hide Caption 9 of 12 Photos: Sinatra: Singer, actor, showman Davis squeezes Sinatra's face in 1961 while comedian Joey Bishop, center, looks on. Hide Caption 10 of 12 Photos: Sinatra: Singer, actor, showman Sinatra recorded with many of the greats: Tommy Dorsey, Bing Crosby, Count Basie, Antonio Carlos Jobim. On his birthday in 1967, he finally got to record with Duke Ellington, left, in sessions that would become the album "Francis A. and Edward K." As Stan Cornyn wrote in the liner notes for the album: "The singer today is one year older. His singing, one more year profound." Hide Caption 11 of 12 Photos: Sinatra: Singer, actor, showman For all his standing in public life, Sinatra liked solitude, and many images show him pensive and thoughtful. This shot was taken in Tokyo in 1962. Sinatra said of his pipe-smoking, "It helps me think straight." He died on May 14, 1998. He was 82. Hide Caption 12 of 12

Sinatra followed his father's singing career path and was a 19-year-old on tour when he was kidnapped in 1963. After three days, two of the men collected a $240,000 ransom paid by his father, while the other abductor let the son free. Days later, that kidnapper confessed to his brother, who called the FBI.

The kidnappers were nabbed within hours, the FBI said.

At trial, their defense team claimed it was a publicity stunt to help the young singer's career, but there was no evidence to support that. The men were convicted.

I am deeply saddened to hear of the passing of Frank Sinatra Jr and send my sympathy to Tina and Nancy and the Sinatra family. — Tony Bennett (@itstonybennett) March 17, 2016

Sinatra also said that when he was very young, he saw his father more on a movie screen than he did in person.

"He was a good father as much as it was within his power," he said.

But, in his father's last years of touring, Sinatra Jr. was the music legend's bandleader and the two had a closer relationship.

Sinatra, whose voice and looks were very much like his father's, released about a half dozen albums.

"My lack of success does not trouble me at this stage in my life," he told the Guardian four years ago.

And he recently told the Daytona Beach News-Journa l that he wasn't upset that his life as a singer was nowhere close to his famed father's career.

"I think in my generation, when I came along in the early '60s, the type of music that was in vogue in society in those days had moved on to another kind of music," Sinatra told the newspaper. "I was trying to sell antiques in a modern appliance store."

Sinatra also did some acting, appearing in almost 20 shows, including the animated series "Family Guy," and playing himself in an episode of "The Sopranos."

"Frank Sinatra, Jr. was a friend to Family Guy, and a friend to me. I'm saddened at his passing, but grateful to have known him. RIP, Frank," tweeted Seth MacFarlane, the show's creator and star.

Sinatra's father, 82, died in 1998 of a heart attack. Sinatra Jr. is survived by his sisters, Nancy and Tina Sinatra, and a son, Michael Sinatra.