how old was marilyn monroe in gentlemen prefer blondes

Marilyn Monroe was born on June 1, 1926. "Gentlemen Prefer Blondes" was released on July 15, 1953. Marilyn Monroe secured her role as Lorelei Lee on her 26th birthday, June 1, 1952. Therefore, she was about 26 years old when she acted in "Gentlemen Prefer Blondes" and 27 years old when the film was released.