Alan Campbell, who played Joe Gillis opposite Buckley's Norma Desmond in Broadway's Sunset Boulevard, will join the Tony winner for her 8 PM concert March 7, and Buckley's The Mystery of Edwin Drood co-star, Howard McGillin, will duet with Buckley at the 10:30 PM show.

Buckley, last on The Great White Way in a Tony-nominated performance in Triumph of Love, is currently performing Broadway By Request through March 7 at Feinstein's at Loews Regency. Show times are Tuesday-Thursday at 8:30 PM and Friday and Saturday at 8 and 10:30 PM.

Directed by Richard-Jay Alexander, the engagement also features the comedic and musical talents of Playbill.com columnist Seth Rudetsky.

Buckley, according to press notes, "will perform selections picked by the audience from her illustrious Broadway career in landmark musicals such as Cats, Sunset Boulevard, The Mystery of Edwin Drood, Song and Dance and more. This unique evening of music, which will be different every night, will offer rare video footage and occasional special guests."

In a previous statement director Jay-Alexander said, "The idea of Broadway By Request was born at Feinstein's almost a year ago, during Buckley's last engagement. During the run, the idea of doing something special for the late shows came up, and how the audiences had been expressing their desire for an all-Broadway program. So, we tried it and people came." Betty Buckley offered acclaimed performances in Sunset Boulevard, Carrie, Song & Dance, The Mystery of Edwin Drood, 1776 and Promises, Promises. She won a Tony Award for her performance as Grizabella in the Broadway production of Cats, and she starred on the London stage in Promises, Promises and Sunset Boulevard, earning an Olivier Award nomination for her work in the latter. Also a TV ("Eight Is Enough") and film ("Tender Mercies") star, the actress-singer devotes much of her time to concert appearances around the world. Her solo CD, "Stars and the Moon: Betty Buckley Live at the Donmar Warehouse," was nominated for a Grammy Award and is available on the Concord Records label. The actress was also seen on the final three seasons of the acclaimed HBO series "Oz" as well as in the Lincoln Center revue, Elegies: A Song Cycle. Buckley's newest recordings, "Quintessence" and "Betty Buckley 1967," are both available on the Playbill Records/Sony BMG Masterworks Broadway label. Buckley most recently scored raves for her work as Mrs. Jones in "The Happening."

Feinstein's at Loews Regency is located at 540 Park Avenue at 61st Street in New York City. For ticket reservations call (212) 339-4095 or visit feinsteinsatloewsregency.com and TicketWeb.com.