His daughter-in-law, Jennifer Jennings, confirmed his death. Mr. Michaels had Alzheimer’s disease.

Mr. Michaels made a splash on Broadway in 1962 with his play “Tchin-Tchin,” an Americanized version of a farcical, bittersweet French comedy about a pair of betrayed spouses attempting, ineptly, to gain their revenge by having an affair of their own. It was reviewed enthusiastically — “Like the fool in motley, it capers wildly and mourns delicately,” Howard Taubman wrote in The New York Times — and ran 222 performances. It was nominated for a Tony for best play in the spring of 1963, though it lost to Edward Albee's “Who’s Afraid of Virginia Woolf?"

“Tchin-Tchin” starred Margaret Leighton and Anthony Quinn, the first of many name-brand stars who were attracted to Mr. Michaels’s work. In 1964, Alec Guinnes won his only Tony for his performance in the title role in “Dylan,” Mr. Michaels’s biographical portrayal of the poet Dylan Thomas. (The play itself was also nominated; the winner that year was “Luther” by John Osborne.)

And in 1965, Robert Preston played the title role in the musical “Ben Franklin in Paris,” for which Mr. Michaels wrote the book (and the lyrics to Mark Sandrich Jr.’s music), earning his third Tony nomination and losing to the author of another legendary production, Joseph Stein, for “Fiddler on the Roof.”

Mr. Michaels’s successes led to some unsuccessful partnerships. He and the composer Richard Rodgers collaborated on a musical, “The Beautiful Woman,” about the Egyptian queen Nefertiti, that was reportedly to star Diahann Carroll, but the project was never completed. Mr. Michaels also worked with the composer Mitch Leigh (“Man of La Mancha”) on a musical called “Halloween”; it never made it to Broadway despite a road-tryout cast that included Barbara Cook and Jose Ferrer.
Two other shows he wrote — “Goodtime Charley,” a 1975 musical about Joan of Arc starring Joel Grey and Ann Reinking, and “Tricks of the Trade” (1980), a cold war spy story set in a New York psychiatrist’s office, starring George C. Scott and Trish Van Devere — appeared on Broadway but were short-lived.

Sidney Ramon Michaels was born in New York City on Aug. 17, 1927. His parents divorced when he was young, and he grew up in Brookline, Mass., in the home of his father, Max Michaels, who was a producer of burlesque shows and a theater manager in Boston. After high school, he served in the Coast Guard and then studied drama at Tufts University, graduating in 1950.

In addition to his plays and musicals, Mr. Michaels wrote for television and the movies; his credits include “The Night They Raided Minsky’s,” the bawdy 1968 film comedy that purports to tell the story of the birth of striptease.

Mr. Michaels lived in Westport. He is survived by his wife, Louisette, whom he married in 1956; a sister, Meryle Ober, of Newton, Mass.; a son, Cotter, of Fairfield, Conn., who is married to Ms. Jennings; a daughter, Candia Steen, of New York City; and six grandchildren.  

MICHAELS, Sidney Ramon
Born: 8/17/1927, New York City, New York, U.S.A.
Died: 4/29/2011, Westport, Connecticut, U.S.A.

Sidney Michaels' western - screenwriter:
The Deputy (TV) - 1959