Madison "Maddie" Nicole Ziegler (born September 30, 2002) is an American child dancer, actress and model. She is known for appearing in Lifetime's reality show Dance Moms and for starring in music videos of Sia's songs, including "Chandelier" and "Elastic Heart", which cumulatively have attracted more than 1.6 billion views on YouTube. Ziegler has also guest-starred on scripted shows and danced on various TV shows, and she has been seen on magazine covers and in feature articles. She has modeled for Capezio, Ralph Lauren and Target, among other brands. Ziegler was named by Time magazine as one of the "30 most influential teens of 2015". She is expected to make her feature film debut in 2016 in The Book of Henry.