Peter Ackerman

A quartet of misfits (including a fast talking but dim sloth named Sid; a moody woolly mammoth named Manny; a devilish saber-toothed tiger named Diego; and an acorn-crazy saber-toothed squirrel known as Scrat) unexpectedly, and reluctantly, comes together in a quest to return a human infant to his father. (Twentieth Century Fox)

The sub zero heroes are back. Scrat is still trying to nab the ever elusive nut, while maybe finding true love. Manny and Ellie await the birth of their mini-mammoth. Diego the saber toothed tiger wonders if he's growing too soft and Sid gets into trouble when he creates his own makeshift family by hijacking some dinosaur eggs.

The flightless birds and scheming green pigs take their feud to the next level.