You Never Can Tell is 1951 American comedy film directed by Lou Breslow and starring Dick Powell, Peggy Dow and Joyce Holden.

Should King die, the fortune will pass to the late millionaire's secretary, Ellen (Peggy Dow).

Lion also sends Golden Harvest, a racehorse, back to earth as Goldie Harvey (Joyce Holden) to help Rex.

Goldie and Rex must solve the case before the full moon or they will have to remain on earth as humans.

Writing in AllMovie, critic Hal Erickson reported that the "most delightful aspect of You Never Can Tell is the film's ability to successfully sustain its single joke for 78 minutes," and that it is a "captivating piece of whimsy.