Cy Coleman (June 14, 1929 - November 18, 2004) was an American composer, songwriter, and jazz pianist.

Coleman's career as a Broadway composer began when he and Leigh collaborated on Wildcat (1960), which marked the Broadway debut of comedienne Lucille Ball. The score included the hit tune "Hey Look Me Over" (which was later adapted into one of LSU's school songs, "Hey, Fightin' Tigers"). When Ball became ill she left the show, and it closed. Next for the two was Little Me, with a book by Neil Simon based on the novel by Patrick Dennis (Auntie Mame). The show introduced Real Live Girl and I've Got Your Number, which became popular standards.
In 1964, Coleman met Dorothy Fields at a party, and when he asked if she would like to collaborate with him, she is reported to have answered, "Thank God somebody asked". Fields was revitalised by working with the much younger Coleman, and by the contemporary nature of their first project, which was Sweet Charity, again with a book by Simon, starring Gwen Verdon, and introducing the songs If My Friends Could See Me Now, I'm a Brass Band and Hey, Big Spender. The show was a major success and Coleman found working with Fields much easier than with Leigh. The partnership was to work on two more shows – an aborted project about Eleanor Roosevelt, and Seesaw which reached Broadway in 1973 after a troubled out-of-town tour. Despite mixed reviews, the show enjoyed a healthy run. The partnership was cut short by Fields' death in 1974.

Coleman remained prolific in the late 1970s. He collaborated on I Love My Wife (1977) with Michael Stewart, On The Twentieth Century (1978) with Betty Comden and Adolph Green, and Home Again, Home Again with Barbara Fried, although the latter never reached Broadway.

In 1980, Coleman served as producer and composer for the circus-themed Barnum, which co-starred Jim Dale and Glenn Close. Later in the decade, he collaborated on Welcome to the Club (1988) with A.E. Hotchner, and City of Angels (1989) with David Zippel. In the latter, inspired by the hard-boiled detective film noir of the 1930s and '40s, he returned to his jazz roots, and the show was a huge critical and commercial success.