Kimberly Jean Brown (born November 16, 1984) is an American actress and former child model. She is known for her roles as Marah Lewis #3 on The Guiding Light (for which she earned an Emmy nomination), Annie Wheaton in the Rose Red miniseries (an original miniseries written by Stephen King), teen witch Marnie Piper on the Halloweentown series, and Sarah Sanderson in Bringing Down the House.

By the time she was 11 years old, Brown had already enjoyed success as a child model with Ford Models and performed in multiple Broadway shows. At the age of 13, Brown was cast in her most notable film, the Disney Channel Original Movie Halloweentown, in which she played 13-year-old teen witch Marnie Piper. She reprised her role as Marnie in two sequels.

In 1999, she co-starred with Janet McTeer in Tumbleweeds. She also starred in another Disney Channel original movie, the 2000 film Quints. She portrayed young Christine Chapman in My Sister's Keeper (2002), Sarah Sanderson in Bringing Down the House (2003), and Tiffany in Be Cool (2005).

She had a recurring role as Shana Taylor on AMC's Low Winter Sun and appeared in the YouTube series Christy's Kitchen Throwback. In May 2021, it was announced she had joined the cast of General Hospital.