"Hollywood and Vine" (1945) Comedy

A young girl arrives in Hollywood determined to become a star in the movies, but finds that attaining stardom is a lot more difficult then she counted on. Howewver, she does become a star of sorts--as the owner of a dog who DOES become a movie star.

Director: Alexis Thurn-Taxis
Writers: Edith Watkins (screenplay), Charles Williams (screenplay)
Stars: James Ellison, Wanda McKay, Franklin Pangborn

https://www.imdb.com/title/tt0037786/?ref_=fn_al_tt_1