Lucy Alexis Liu (; born December 2, 1968) is an American actress. Born in New York City to Chinese immigrant parents, her accolades include a Critics' Choice Television Award as well as nominations for two Primetime Emmy Awards. Liu had her breakthrough role as Ling Woo in the Fox legal comedy-drama series Ally McBeal (1998–2002). She received further recognition for starring in the action comedy film Charlie's Angels (2000) and its sequel Charlie's Angels: Full Throttle (2003), and the martial arts action film Kill Bill: Volume 1 (2003) and its sequel Kill Bill: Volume 2 (2004). She also starred in the films Payback (1999), Shanghai Noon (2000), Chicago (2002), Lucky Number Slevin (2006), Watching the Detectives (2007), The Man with the Iron Fists (2012), Set It Up (2018), Shazam! Fury of the Gods (2023), and Presence (2024). Liu starred as Dr. Joan Watson in the CBS crime drama series Elementary (2012–2019). She also voiced Master Viper in the first three installments of the Kung Fu Panda franchise (2008–2016) and Silvermist in the Tinker Bell series (2008–2015). Her other voice credits include the children's series Maya & Miguel (2004–2007) on PBS Kids, the animated films Mulan II (2004) and Strange World (2022), as well as the English and Mandarin-dubbed versions of the animated films The Tale of the Princess Kaguya (2013) and Magic Wonderland (2014).