| Appeared in:
| How the Grinch Stole Christmas! (Book)|
How the Grinch Stole Christmas! (Film)
How the Grinch Stole Christmas! (TV Special)
In the 2017 film, she'll be voiced by Kaitlyn Maher.
When the Grinch comes down the chimney to steal the house's contents, Cindy Lou's sneaking in for a glass of water. The Grinch slinks in & gets her a glass of water, takes her into her room, & finishes stealing things.
At the end, when the Grinch's about to carve the Roast Beast, Cindy Lou Who's right at his side to get her portion.
She has blonde hair, blue eyes & thick, wiry antennae.