| Charles Grodin | Mr. Parker |
| Kieran Culkin | Ralph 'Ralphie' Parker |
| Mary Steenburgen | Mrs. Parker |
| Christian Culkin | Randy Parker |
| Al Mancini | Zudoc, The Old Man's fishing buddy |
| Troy Evans | The Old Man's fishing buddy |
| Roy Brocksmith | Mr. Winchell the Assessor |
| Glenn Shadix | Leopold Doppler, Manager of Orpheum Theater |
| Dick O'Neill | Pulaski, Shopkeeper |
| Wayne Grace | Emil Bumpus |
A son of eccentric parents grows into young adulthood during the course of a summer.
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