At the 25th Annual Gilbert family reunion, siblings Gil, Dil, and Lil compete for the coveted Gilbert Cup.
| Actor | Role |
|---|---|
 Christopher GorhamDil Gilbert | Dil Gilbert |
 Nicholas BrendonGil Gilbert | Gil Gilbert |
 Terry BradshawWill Gilbert | Will Gilbert |
 Charisma CarpenterKatherine | Katherine |
 Fiona ReidGrandma | Grandma |
 Jayne EastwoodCarol Gilbert | Carol Gilbert |
 Jennifer RobertsonLil Gilbert (as Jenn Robertson) | Lil Gilbert (as Jenn Robertson) |
 Mayko NguyenApril | April |
 Stacy SmithJulie Gilbert | Julie Gilbert |
| SSarah EnglishPam | Pam |
| NNikki BarnettBecky | Becky |
| CCecil WrightTeenie Nelson | Teenie Nelson |
| TTara BaxterWildlife Officer | Wildlife Officer |
 Jackie TorrensWaitress | Waitress |
| DDonne D'ArnallGil's Daughter | Gil's Daughter |
 David Wm. MarshFather | Father |
| SSlavko NegulicRichard L. Olsen | Richard L. Olsen |
| OOwen PattisonYoung Dil | Young Dil |