Invitación a la felicidad was released in the year 1939。Invitación a la felicidad is also called as Invitation to Happiness, Knock-out。

Trainer Pop Hardy thinks his heavyweight boxer 'King' Cole could be champ...some day; he wants to sell a half interest in Cole to his rich friend Wayne. Wayne's daughter Eleanor is disdainful, but brash Cole manages to get under her skin. Can a society dame and a mug find happiness together? And can she wait for his slow rise to fame?

Invitación a la felicidad actors and actresses include Fred MacMurray, Irene Dunne, Mack Gray。