Casey and Derek volunteer to organize Casey's aunt's wedding reception, but Casey's cousin, Vicki, is threatening to blow the entire thing apart because her mom didn't even ask her how she felt about the marriage.
- Michael Seater as Derek Venturi
- Ashley Leggat as Casey McDonald
- Jordan Todosey as Lizzie McDonald
- Daniel Magder as Edwin Venturi
- Ariel Waller as Marti Venturi
- Joy Tanner as Nora McDonald
- John Ralston as George Venturi