The official archives of Hollywood studio 20th Century Fox have been opened to support a charity auction.
Norma Jean became Marilyn soon after joining Fox
One memo notifies executives that Norma Jean Dougherty was changing her professional name to Marilyn Monroe.
Among the 200 items is a contract allowing Presley to break strict grooming codes and wear his hair however he saw fit for Love Me Tender.
The sale on 25 January also contains contracts for the likes of Cary Grant, Rita Hayworth and Clark Gable.
Trade paper Variety describes how Humphrey Bogart's first studio contract, from 1930, shows he was paid $400 a week but by 1951 he was getting $17,500 a week.
A contract signed by Judy Garland to star in the 1967 film Valley of the Dolls is accompanied by a termination letter drafted after she showed up for work drunk.
Another agreement shows Laurel and Hardy were required to furnish their own wardrobes for films. Bigger stars got clothes but were told to provide their own underwear.
Proceeds from the sale, through New York auctioneer Swann Galleries, will benefit the Motion Picture & Television Fund, a charity for Hollywood actors and other employees.