The role of romantic matchmaker goes to Jimmy Hunt in "Katie" as sort of a graduation for the 10-year-old lad, since he was recently one of four boys adopted by Joel McCrea in "Saddle Tramp" at Universal-International. Prior to that he was the son of Ruth Hussey and Ronald Reagen in "Louisa" ans was of Clifton Webb's offspring in "Cheaper by the Dozen." In "Katie" Hunt's assignment requires him to bring Ann Blyth and Mark Stevens together. He has solo duty as a youngster in the new film and Hunt sponsors feel stardom may lurk.