Sloane Nicolette Momsen (born December 20, 1996 in St. Louis, Missouri) is an American actress. She is the younger sister of Taylor Momsen. Her parents are Michael and Collette Momsen. Making appearances in the live action version of How the Grinch Stole Christmas with her sister Taylor, as a little girl dreaming of sugarplums. Sloane's first major role came two years later, when she starred in We Were Soldiers also with Taylor. Sloane's next appearance on television was not made until 2004 on the television drama Law & Order.