Family Guy (1999)

S24E13 Friend's Best Man

Stewie proposes marriage to his beloved teddy bear Rupert and is delighted when the fuzzy groom-to-be accepts. But when it comes time to pick a best man, Stewie passes over his canine companion Brian. Feeling deeply snubbed, Brian struggles to hide his hurt feelings as Stewie lavishes attention on a new, four-legged friend. The slight sends Brian into a spiral of jealousy, questioning whether their friendship means as much to Stewie as it does to him.