Who played sindy loo hoo in the Grinch?

Sindy Lou Who in "How the Grinch Stole Christmas" (2000) was played by actress Taylor Momsen. Her character is a sweet and caring young girl who seeks to understand the Grinch and ultimately helps to bring the true spirit of Christmas to Whoville. Taylor Momsen's performance contributed to the film's heartwarming message about the holiday season.