Mr. Belvedere Goes to College

Mr. Belvedere discovers that he is ineligible for an honorary award because he never attended college. So he enrolls as a freshman in a major university, becoming the target for "hazing" from obnoxious upper classman Alan Young. The middle-aged Belvedere rapidly builds himself into Big Man on Campus, which complicates his intention of remaining incognito while attending college... (allmovie.com)