Tony Award Winners Audra McDonald, Sara Ramirez and Loretta Devine will all headline "Good Medicine" - a once-in-a-lifetime musical event with casts of the popular ABC television shows Grey's Anatomy and Private Practice.

Almost all the stars of these two popular TV series will be participating, and the evening will include musical performances by Paul Adelstein, Amy Brenneman, Tim Daly, T.R. Knight, Chris Lowell, James Pickens, Gina Taylor-Pickens and Chandra Wilson. Justin Chambers, Eric Dane, Taye Diggs, Katherine Heigl, Chyler Leigh, Sandra Oh, Ellen Pompeo, Brooke Smith, Kadee Strickland, Shonda Rhimes (creator/executive producer of both series) and Kate Walsh will also participate.

"Good Medicine," from the Private Practice and Grey's Anatomy cast, is held to benefit the Solidarity Fund - set up by the Writer's Guild of America to help members of film and TV productions who were put out of work by the strike.

The event is being held at Royce Hall at UCLA, on Friday, February 29 at 8:00 p.m. Tickets for the event ($85) are on sale and open to the general public. For more information and to purchase tickets click here.

Steve Marsi is the Managing Editor of TV Fanatic. Follow him on Google+ or email him here.