Shrek/Monsters, Inc.

Cast

 * Shrek as Sulley (Both beginning the letter with "S")
 * Donkey as Mike
 * Darla (from Finding Nemo) as Boo
 * Princess Fiona as Celia
 * Lord Farquaad as Mr Waternoose
 * Randall as himself
 * Fungus as himself
 * Puss in Boots as Smitty
 * Gingy as Needleman
 * Roz as himself
 * King Harold as Yeti
 * Richard Tyler (from Pagemaster) as Child