Teeny little Frankie Muniz! He was as adorable as the puppy he follows around in My Dog Skip.
She went on to have a very nice semi-adult career on Nickelodeon, but Miranda Cosgrove was at her precocious best in School of Rock.
We can't pick just one favorite kid in The Little Rascals—they're all cartoonishly adorable.
Dakota Fanning is the tiny queen of all child stars, and while she's done some amazing dramatic work, Uptown Girls is a guilty pleasure.
So what if she kind of inadvertently ruins Big and Carrie's wedding? Charlotte's daughter Lily in the Sex and the City is still lovely.
Jonathan Taylor Thomas is so much more than Home Improvement and Lion King. His funny lead role trying to destroy Chevy Chase in Man of the House is an underrated gem.
Before she was Napoleon Dynamite's date, Tina Majorino was trying to train a seal in the doubly cute Andre.
A Little Princess is a tearjerker for many reasons, so let's just pick one scene: Liesel Matthews saying, "I am a princess. All girls are. Didn't your father ever tell you that? Didn't he?
So what if his conception is drunken and creepy? The little tot in The Switch is such a wonderful Jason Bateman impersonator that we love him as much as the real JB.
How great were identical twins Cole and Dylan Sprouse in Big Daddy? They got a whole Disney empire out of their success in this movie!
Twentieth Century Fox
She has grown up into a fine actress, but Mae Whitman will always be the adorable tomboy daughter of George Clooney in One Fine Day to us.
All of classic rom-com Sleepless in Seattle rests on the tiny shoulders of actor Ross Malinger, who sets the whole thing into action.
Twentieth Century Fox
Mara Wilson had lots of amazing roles in the 1990s (Matilda, anyone?), but she's at her most precious as the lisping youngest daughter in Mrs. Doubtfire.
Fox Searchlight Pictures
Helping Abigail Breslin get even cuter in Little Miss Sunshine? The fake belly she wore for the role!
Just looking at this image of Macaulay Culkin in My Girl is enough to make us start crying, so we'll just stop here.
The world will never forget how much a human head weighs, thanks to the genius Jonathan Lipnicki in Jerry Maguire.