Scrat is a saber-toothed squirrel and always worries about his nut, but this time he has got more than the nut to worry about.

Sid is a ground sloth who is a little bit clumsy, slow, fast-talking and unpopular. He is well-intended but is always getting into trouble.

Manfred "Manny", is a woolly mammoth, shown as one of the main protagonists in all three Ice Age films. He can be serious, but is otherwise caring and friendly. He can also be a little bit overprotective and is quite up to the task.

Diego is a sabertooth tiger with a somewhat sarcastic personality and does not look really friendly, but when someone saves him he is likely to give something back.

Ellie is the beloved wife of Manny and mother of little Peaches. She is fun-loving and a free spirit who also takes care of her two possum brothers Crash and Eddie.

Peaches looks in many ways like her mother and is a kind, playful, adventurous little mammoth who will get in danger in Ice Age Live!

Buck is a larger than life, swashbuckling one eyed weasel who helps the herd when needed. Quite a hero but slightly crazy.

Shadow is a dangerous white prehistoric bird. His color makes him virtually invisible in this world of ice and snow, hence his name. Shadow has three servants who will do everything for him.

A tribe of Mini Sloths are smaller sloths who worship Sid and call him Fire King.

Giant prehistoric flightless wild birds and servants of Shadow. Duke is the leader and therefore Shadow's right hand. Thorn is the athletic and agile one. Chaos is the naïve, clumsy bird who wishes he could fly. He has an unexpected talent for cooking.

The possum brothers of Ellie are always getting in trouble with their loud-mouth and love of extreme bad boy behavior. But both are very protective of Ellie.