A middle-aged genius goes to college for the first time.
| Actor | Role |
|---|---|
 Clifton WebbLynn Belvedere | Lynn Belvedere |
 Shirley TempleEllen Baker | Ellen Baker |
 Tom DrakeBill Chase | Bill Chase |
 Alan YoungAvery Brubaker | Avery Brubaker |
 Jessie Royce LandisMrs. Chase | Mrs. Chase |
 Kathleen HughesKay Nelson | Kay Nelson |
 Taylor HolmesDr. Gibbs | Dr. Gibbs |
| AAlvin GreenmanCornelius Whittaker | Cornelius Whittaker |
 Paul HarveyDr. Keating | Dr. Keating |
 Barry KelleyGriggs | Griggs |
 Robert PattenJoe Fisher | Joe Fisher |
 Peggie CastleJean Auchincloss (uncredited) | Jean Auchincloss (uncredited) |
 Jeff ChandlerPolice Officer #66 (uncredited) | Police Officer #66 (uncredited) |
 Sally ForrestMiss Cadwaller | Miss Cadwaller |
 Lee MacGregorHickey | Hickey |
 Geneva GrayTri Gam Coed (uncredited) | Tri Gam Coed (uncredited) |