Chenoweth, according to a press notice, will duet with Marlon Saunders on the Oscar-nominated Alan Menken-Stephen Schwartz song "That's How You Know" from the film "Enchanted." Amy Adams, who stars in "Enchanted," will also perform a song from the film, Menken and Schwartz's "Happy Working Song." The third Oscar-nominated "Enchanted" song, "So Close," will be performed by Jon McLaughlin.

Other performers will include Glen Hansard and Marketa Irglova (singing "Falling Slowly" from "Once") and Jamia Simone Nash, who will be joined by the IMPACT Repertory Theatre of Harlem on the song "Raise It Up" from the film "August Rush."

Presenters for the annual Oscar broadcast were also announced: They will include Alan Arkin, Jennifer Hudson, Helen Mirren and Forest Whitaker as well as Amy Adams, Jessica Alba, Cate Blanchett, Josh Brolin, Steve Carell, George Clooney, Penelope Cruz, Miley Cyrus, Patrick Dempsey, Cameron Diaz, Colin Farrell, Harrison Ford, Jennifer Garner, Tom Hanks, Anne Hathaway, Katherine Heigl, Jonah Hill, Dwayne Johnson, Nicole Kidman, James McAvoy, Queen Latifah, Seth Rogen, Martin Scorsese, Hilary Swank, John Travolta, Denzel Washington and Renee Zellweger.

Hosted by Jon Stewart, the telecast will be penned by writers Hal Kanter, Buz Kohan, Jon Macks and Bruce Vilanch.

The 80th Annual Academy Awards will be broadcast live from the Kodak Theatre in Hollywood, CA, on Feb. 24 beginning at 8 PM ET on ABC-TV.

For more information visit www.oscars.org.