Saxophone player and singer Ronnie Bowers (Dick Powell), is on his way to Hollywood, having been signed to a ten-week contract by All Star Pictures. At the airport, his former employer, Benny Goodman, and his band give him a big sendoff, performing "Hooray for Hollywood".
In Hollywood, temperamental star Mona Marshall (Lola Lane) becomes furious when she learns that another actress has landed a part she desperately wanted. As a result, she refuses to attend the premiere of her latest movie. Publicist Bernie Walton (Allyn Joslyn) convinces studio boss B. L. Faulkin (Grant Mitchell) to substitute a double. Bernie chooses Virginia Stanton (Rosemary Lane), who has already worked as a stand-in for Mona. For her escort, Bernie chooses an unsuspecting (and starstruck) Ronnie.
The charade works. Everyone, from Ronnie to Louella Parsons to the radio host at the premiere (Ronald Reagan) is fooled. Things take an unexpected turn when Ronnie and Virginia begin to fall in love, wading in a fountain pond and singing "I'm Like a Fish Out of Water".
The next day, Bernie takes Ronnie to lunch at the restaurant where Virginia is working as a waitress, to break the news of his date's real identity. Ronnie and Virginia begin dating.
When Mona reads in the newspaper that "she" was at the premiere with Ronnie, she forces Faulkin to buy the young man out of his contract. Photographer Fuzzy Boyle (Ted Healy) appoints himself Ronnie's agent, and they make the rounds, trying to get his acting career started, without success. The two end up employed at a drive-in. When Ronnie sings during work, director Walter Kelton (William Davidson) is impressed and offers him a job. Ronnie is disappointed to learn, however, that he will not be acting, only. Kelton dubbing the singing for Mona's longtime screen partner, Alex Dupre (Alan Mowbray).
Dupre's "singing" impresses the audience at the preview. When Louella Parsons invites him to perform on her radio program, he accepts without thinking. Desperate, All Star Pictures pays Ronnie an exorbitant fee to sing for the actor. However, Ronnie has his own ideas. Virginia (posing as Mona) picks up Dupre in a limousine driven by Fuzzy. The pair drive him out into the countryside so he misses the program. Ronnie substitutes for Dupre and is a hit, so Faulkin decides to re-sign him, at a larger salary.
Did Ronnie find success in acting?
No