Sidney The Sloth, better known as Sid, is the deuteragonist of the Ice Age series.
He is a Megalonyx who is Manny and Diego's best friend and one of Peaches' adoptive uncles.
He is the tritagonist of Ice Age and Ice Age: The Meltdown, the main protagonist of Ice Age: Dawn of the Dinosaurs and the Easter Special, the deuteragonist of the Christmas Special, a major character in Ice Age: Continental Drift and the tetartagonist of Ice Age: Collision Course.
Add actors/actresses and cast the roles/films/series that they were rumored, considered, offered, negotiated, auditioned, turned down, and/or originally casted before getting recasted. (Please double-check in research.)
