Curtis, one of the biggest box-office stars of the 1950s and 1960s and one of Hollywood's busiest playboys, died of cardiac arrest at his home in Henderson, Nevada, outside Las Vegas, where a memorial service is planned for Monday.
The handsome leading man starred in more than 140 films including the classic gladiator drama "Spartacus" and he received an Academy Award nomination for 1958's "The Defiant Ones."
Curtis, who was born Bernard Schwartz in New York to poor Hungarian immigrants on June 3, 1925, got off to a rocky professional start. In one of his first major roles, playing an Arabian in "Son of Ali Baba" in 1952, he wrote in a memoir that he was roundly mocked for proclaiming in a thick New York accent, "Yonduh in the valley of the sun is my fadder's castle."
Still, Universal Pictures' star-making machinery and teen fan magazines managed to make him a heartthrob, and movie-goers loved his dark-haired sex appeal and impish grin.
Within a few years, Curtis had improved enough for Saturday Review magazine to call him "a rare phenomenon, an authentic screen personality who, through hard work, has made himself into an actor of considerable subtlety and some breadth."
Two of his most enduring performances came in "Some Like It Hot" as he teamed with Jack Lemmon -- playing cross-dressers opposite Marilyn Monroe -- and "The Sweet Smell of Success," in which he played a fawning press agent.
His Oscar nomination was for "The Defiant Ones," playing a racist prison escapee chained to a black man played by Sidney Poitier. Other notable films included "Houdini," "Trapeze," "Operation Petticoat," "The Boston Strangler," "The Vikings" and "The Great Imposter."
When the leading movie roles dried up, Curtis struggled with cocaine and alcohol abuse. He eventually overcame those problems and transformed from leading man to character actor, taking roles on TV. He also turned to painting and art to fill his days.
"My father leaves behind a legacy of great performances in movies and in his paintings and assemblages," his daughter, actress Jamie Lee Curtis, said in a statement.
The actor's sixth wife, Jill Vandenberg, told celebrity news show Inside Edition that Curtis died peacefully in his sleep. "His heart survived many things that would have killed an ordinary man," she said. "This time his heart was ready to go."
In Hollywood, fans turned out on the Walk of Fame to lay flowers by Curtis' star.
Curtis started acting after serving on a Navy submarine tender during World War Two. He was known to be demanding at the height of his stardom and television producer Lew Gallo called him "an impetuous child."
His fans were as fascinated by Curtis' private life as they were his movies. He was an inveterate womanizer whose girlfriends included Marilyn Monroe and Natalie Wood. The first of his six marriages was to actress Janet Leigh -- a union he later admitted was partially motivated by publicity value. After divorcing Leigh, he married Christine Kaufman, who was 17 years old when they met while filming "Taras Bulba."