Gallagher, who was last on Broadway in the revival of Noises Off, will play the posh venue May 15-June 2. He will be followed by cabaret veteran Feinstein, who will offer a salute to the late Bobby Short June 5-16.

The current season will also boast Tony Award winner Betty Buckley (March 27-April 7), Jackie Mason (April 10-21), Donny Osmond (April 24-28) and Linda Eder (May 1-12).

The Sunday and Monday-night series will feature Cristina Fontanelli (April 9), Judi Marie Canterino & Friends (April 15), Ron Gartner (April 16), Eileen Fulton (April 22-23, 29-30), Jeff Harnar (May 6, 13, 20, 27 and June 3, 10, 17, 24), Gianni Russo (May 7), Harvey Grant (May 14 and 21), Brandon Cutrell (June 4) and "Rendezvous—An Evening with Edith, Jacques, Charles & Friends" (June 11 and 18).

A four-time Grammy nominee, Michael Feinstein is often credited with reinvigorating the American popular song. The crooner has performed in concert halls around the world and on Broadway and now co-owns his own nightclub, Feinstein's at the Regency. His numerous solo recordings include "Michael and George: Feinstein Sings Gershwin," "Big City Rhythms" "Romance On Film, Romance On Broadway," "Michael Feinstein with The Israel Philharmonic Orchestra" and "Only One Life: The Songs of Jimmy Webb." Feinstein's most recent recording is titled "Hopeless Romantics."

Peter Gallagher, seen on the just-ended TV series "The O.C.," made his Broadway debut in the original production of Grease. His other Main Stem credits include A Doll's Life, The Corn Is Green, The Real Thing, Long Day's Journey Into Night (Tony nomination), Guys and Dolls and Noises Off. Bobby Short, who was one of the cabaret world’s most revered performers, became a vaudeville entertainer at the age of 12. The singer specialized in the works of Cole Porter and Noel Coward, and his numerous recordings included “Songs of New York: Live at the Cafe Carlyle,” “Bobby Short Loves Cole Porter,” “How’s Your Romance?,” “Jump for You,” “Nobody Else But Me,” “Piano” and “Speaking of Love/Sing Me a Swing Song.” Mr. Short died March 21, 2005.

Feinstein's at the Regency is located in Manhattan at 540 Park Avenue at 61st Street. Call (212) 339-4095 for reservations or visit www.feinsteinsattheregency.com.