Marilyn Monroe appeared in a film.
As Young as You Feel ( 1951 ) is a comedy film starring Monty Woolley , Thelma Ritter , and David Wayne , with Marilyn Monroe in a small role . Marilyn Monroe . Over the next two years , she became a popular actress with roles in several comedies , including As Young as You Feel and Monkey Business , and in the dramas Clash by Night and Do n't Bother to Knock .