The photo, described by a Hollywood-savvy character, is of more than 60 MGM stars of the 1940's seated according to importance.
Miller also credits Powell for inspiring her own dancing career, which would lead her to become an MGM musical star a decade later.
In September, she will join 18 other MGM stars for a celebration at Carnegie Hall.
Many MGM stars were fired or not renewed, including Greer Garson and Judy Garland.
The MGM star Norma Shearer saw her photograph at a ski lodge where her parents were working as desk clerk and maid.
"The music changed," said Cyd Charisse, once an MGM star.
Said Arlene Dahl, another MGM star: "It was an art form, never to be replaced.
Kathryn Grayson, a top MGM star, said: "The audience did not change.
After her third marriage ended in 1934, Harlow met William Powell, another MGM star, and quickly fell in love.
Berkeley had several well-publicized run-ins with MGM stars such as Judy Garland.