Teddy McNulty is the youngest of the McNulty boys. He's probably the same age as Tommy, 1 year old, but younger. Teddy has brothers named Timmy, Terry, Todd, and Ty. He is voiced by Tara Strong.
- He is a 1 year old like Tommy but he doesn't turn 1 until in the episode "Fugitive Tommy".
- Terry along with his brothers do not appear in All Grown Up! and they are not mentioned either.