Bridgit Claire Mendler (born December 18, 1992) is an American businesswoman and former actress and singer. She first became known as a child actress, with her early credits including the films Alice Upside Down (2007), The Clique (2008) and Labor Pains (2009). After signing with Disney Channel in 2009, she played Juliet van Heusen on Wizards of Waverly Place (2009–2012) and Teddy Duncan on Good Luck Charlie (2010–2014), and starred in the Disney Channel film Lemonade Mouth (2011). She then appeared on the NBC sitcom Undateable (2015–2016), the ABC/CMT musical television series Nashville (2017), and the Netflix comedy series Merry Happy Whatever (2019).

Mendler began her music career in the 2010s, making her singing debut contributing to the soundtrack of Lemonade Mouth in 2011. She signed with Hollywood Records in 2011 and released debut studio album Hello My Name Is... (2012), which peaked at number 30 on the Billboard 200 and spawned the hit single "Ready or Not". She then embarked on two concert tours: Bridgit Mendler: Live in Concert (2013) and Summer Tour (2013–2014). She independently released the extended play (EP) Nemesis (2016) under the Black Box record label, and embarked on the Nemesis Tour.

From 2010 to 2012, she served as ambassador to nonprofit First Book, which encourages reading, and Give with Target, to raise funds to reform schools in the United States. She began focusing on her education in the late 2010s. From 2017 to 2023, she was a student and researcher with the MIT Media Lab. She is also registered as a PhD candidate with MIT's Center for Constructive Communications and Social Machines group. In 2024, she became the CEO and co-founder of the satellite data startup Northwood Space, and earned a JD from Harvard Law School.