Donny Osmond, Tom Bergeron, Chris Cuomo announcing the new celebs participating on "DWTS" on "Good Morning America" August 17th, 2009. Photo: Steve Fenn, courtesy of ABC.

Disney is upping the ante for their upcoming D23 EXPO. The September fan event that will introduce this seasons roster of stars has just added Donny Osmond to the growing list of talent participating.

The EXPO will be hosted by Dancing with the Stars host, Tom Bergeron and will include Kelsey Grammer, Patricia Heaton, Joseph Fiennes and Ed O’Neill to discuss their new series on the net.

Plus DWTS pros, Cheryl Burke, Derk Hough and Osmond’s partner for season nine of the dance show, Kym Johnson will attend with Burke and Hough performing for the crowd as well as posing for photos and signing autographs.

The EXPO begins September 10th and runs through September 14th, 2009 at the Anaheim Convention Center Arena (right near Disneyland).

Details for the four-day D23 EXPO extravaganza, including ticket prices, are available at www.D23Expo.com.