Who said "I want to be a serious actress."?

This quote is attributed to Marilyn Monroe.

I want to be a serious actress. - Marilyn Monroe

"I want to be a serious actress."

Marilyn Monroe

Actress and Model American 1926–1962

"I am my own muse, I am the subject I know best. The subject I want to know better."

"Imperfection is beauty, madness is genius and it's better to be absolutely ridiculous than absolutely boring."

"A wise girl kisses but never tells."

"If you can make a woman laugh, you can make her do anything."