Andrés Walter Muschietti is an Argentine film director and screenwriter who achieved wide recognition with the 2013 film Mama. He gained further recognition for directing both films in the It film series, the 2017 film adaptation of the Stephen King novel and its sequel, It Chapter Two. In 2023, he directed the DC Extended Universe film The Flash.

Mama is a 2013 supernatural horror film directed and co-written by Andy Muschietti in his directorial debut and based on his 2008 Argentine short film Mamá. The film stars Jessica Chastain, Nikolaj Coster-Waldau, Megan Charpentier, Isabelle Nélisse, Daniel Kash, and Javier Botet as the title character.