Monty is the (former) secondary antagonist of Stuart Little, a supporting protagonist of Stuart Little 2, Stuart Little: The Animated Series, and Stuart Little 3: Call of the Wild and the secondary tritagonist of Stuart Little 4. He is Snowbell's friend who wanted to eat Stuart so badly, and Snowbell was afraid that he would spread word about Stuart being a member of the family. During a showdown in the trees one night, Snowbell broke one branch, sending Monty and the gang of cats into the water.
Monty is both nice and rude at times. He is known for being a blabbermouth as he always spreads word about many things, such as Stuart having a "pet cat" in the first film (which he found extremely hilarious).
- Monty is the (former) tertiary antagonist of Stuart Little and the tetartagonist of Stuart Little 2.
- His voice sounds like teenger.