Gladys (simply known as Granny Sloth) is Sid's annoying 80-year old grandmother who made her first appearence in Ice Age: Continental Drift. She has a large pet whale named Precious (who is presumed imaginary). Granny is voiced by Wanda Sykes.
- Granny will reappear in an Ice Age crossover Manny, Sid, and Diego's Adventures of Kung Fu Panda 2, where, at the end, she will rejoin the Sub-Zero Adventure Group, along with Peaches and Louis the Molehog.
- Granny will make her guest appearence in other projects outside of the Manny, Sid, and Diego's Adventures Series, such as Danny Phantom's Adventures of Short Circuit 2, Danny Phantom and Shrek's Adventures of Rio, and the several episodes of Captain Charles T. Baker's Adventures of Kim Possible.