Prowse met Frank Sinatra on the set of Can-Can. Time magazine did not rate the movie highly, but declared Prowse the best thing in it: "In fact, the only thing really worth seeing is Juliet Prowse, a young South African hoofer who puts some twinkle in the stub-toed choreography. And the only thing really worth hearing is the crack that Frank flips back at Juliet when she whips a redoubtable hip in his direction. "Don't point", he gasps. "It's rude." She would go on to appear with Sinatra and other notable guests such as Ella Fitzgerald, Peter Lawford, Hermione Gingold, the Hi-Lo's, Red Norvo, Nelson Riddle and his orchestra on the 1959 Frank Sinatra Show. She at times would sing in the chorus with other guests or Sinatra would sing to her.