Elizabeth Chai Vasarhelyi is an American documentary filmmaker. She was the director, along with her husband, Jimmy Chin, for the film Free Solo, which won the 2019 Academy Award for Best Documentary Feature. The film profiled Alex Honnold and his free solo climb of El Capitan in June 2017. Their first scripted film venture was Nyad, a biopic chronicling Diana Nyad's quest to be the first person to swim from Cuba to Florida.

Nyad is a 2023 American biographical sports drama film about swimmer Diana Nyad's multiple attempts in the early 2010s to swim the Straits of Florida, with flashbacks to her early life. It is directed by Elizabeth Chai Vasarhelyi and Jimmy Chin and written by Julia Cox, based on Nyad's 2015 memoir Find a Way. It stars Annette Bening as Nyad, with Jodie Foster and Rhys Ifans in supporting roles.