Note that the uploaded photo is a larger, better quality copy than the one shown in the newspaper.
A search for original registrations was done in both artwork and periodicals for the year 1957. There were no listings for United Press International in artwork and no listings for the Times Standard in publications. There's no evidence of original copyright here.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 p.m.a.), Mainland China (50 p.m.a., not Hong Kong or Macao), Germany (70 p.m.a.), Mexico (100 p.m.a.), Switzerland (70 p.m.a.), and other countries with individual treaties.
{{Information |Description=Photo of Elsa Maxwell and Marilyn Monroe at the April in Paris Ball held at the Waldorf-Astoria in New York in 1957. |Source=[http://www.newspapers.com/clip/1590316/elsa_maxwell_uses_marilyn_monroe_to/ Elsa Maxwell Uses Maril...