Alicia Keys, Bruce Springsteen, Stevie Wonder and Bon Jovi are a few of the artists joining forces with TV and film celebrities like Jim Carrey and Tom Hanks for an unprecedented telecast of music and supportive messages on Friday.
The event will raise funds for a long-term relief effort for the thousands who have been affected by last Tuesday's terrorist attacks.
The two-hour, commercial-free "America: A Tribute to Heroes" will be broadcast live from New York and Los Angeles on ABC, CBS, Fox and NBC at 9 p.m. ET/8 p.m. CT, and tape-delayed for the Mountain and Pacific time zones, according to an event publicist.
Others slated to appear in the television special include Neil Young, Sheryl Crow, Cameron Diaz, Robert De Niro, Billy Joel, Tom Petty, Will Smith, George Clooney, Amy Brenneman, the Dixie Chicks, Clint Eastwood, Calista Flockhart, Dennis Franz, Kelsey Grammer, Tom Cruise, Faith Hill, Conan O'Brien, Ray Romano, Julia Roberts, Paul Simon, Sela Ward and Robin Williams, with more expected to be added.
Production costs will be paid for by the networks, and everyone involved will be donating their time and resources. Methods for contributing money to the relief effort will be announced on the program.
While "America: A Tribute to Heroes" will air on the major networks, all other TV and cable networks are also invited to show the program free of charge. MTV and VH1 are among the stations that have already confirmed their participation.
MTVi's parent company, Viacom, also owns CBS.