Here's who you're looking at: (left to right):
1st Row: James Stewart, Margaret Sullivan, Lucille Ball, Hedy Lamarr, Katharine Hepburn, Louis B. Mayer, Greer Garson, Irene Dunne, Susan Peters, Ginny Simms, Lionel Barrymore
2nd Row: Harry James, Brian Donlevy, Red Skelton, Mickey Rooney, William Powell, Wallace Beery, Spencer Tracy, Walter Pidgeon, RobertTaylor, Pierre Aumont, Lewis Stone, Gene Kelly, Jackie Jenkins
3rd Row: Tommy Dorsey, George Murphy, Jean Rogers, James Craig, Donna Reed, Van Johnson, Fay Bainter, Marsha Hunt, Ruth Hussey,Marjorie Main, Robert Benchley
4th Row: Dame May Whitty, Reginald Owen, Keenan Wynn, Diana Lewis, Marilyn Maxwell, Esther Williams, Ann Richards, Marta Linden, Lee Bowman, Richard Carlson, Mary Astor
5th Row: Blanche Ring, Sara Haden, Fay Holden, Bert Lahr, Frances Gifford, June Allyson, Richard Whorf, Frances Rafferty, Spring Byington, Connie Gilchrist, Gladys Cooper
6th Row: Ben Blue, Chill Wills, Keye Luke, Barry Nelson, Desi Arnaz, Henry O'Neill, Bob Crosby, Rags Ragland
This is an amazing picture.
What with all the egos in Hollywood , you may never again see a picture like this again.
This is a promotional photo of many of the actors under contract with MGM at the studios 20th birthday party.