Sadie Sink (born April 16, 2002) is an American actress. She is best known for portraying Maxine "Max" Mayfield in Netflix's Stranger Things and has also appeared in Blue Bloods and The Americans. Sink has also worked on Broadway, with credits including Annie and The Audience.
Sink was born in Brenham, Texas. She has three older brothers and a younger sister.
In 2009, due to her obsession with recreating Disney’s High School Musical with her brother, Mitchell, when she was seven years old, her mother decided to send her off to acting classes in a community theater, in nearby Houston. In turn, it led to a Broadway audition and a role in the 2012 revival of Annie at the age of eleven years old. She had to prepare herself for the role by taking dance lessons and doing vocal training. She was initially the standby for all the orphans, until the original lead left, wherein she began alternating the title role for a few months, then closing the show as Duffy and understudy to Annie.
While still starring in the play, she appeared in the Emmy-winning series The Americans.
In 2015, she co-starred with Helen Mirren in The Audience on Broadway, as young Queen Elizabeth II. She also had a small role in Chuck.
While filming the drama movie The Glass Castle, she became very close with Woody Harrelson, and particularly with his daughter, Makani. She was already a vegetarian, but Harrelson and his family inspired her to go vegan.
In 2017, she played Maxine "Max" Mayfield in the Netflix original Stranger Things. In 2018, she collaborated with Rooney Mara, Sia, Joaquin Phoenix and Kat von D to narrate Chris Delforce's animal rights documentary Dominion. For her contribution to the documentary, she was granted the 2018 Award of Excellence for Narration by Hollywood International Independent Documentary Awards.
In March 2019, she joined the cast of Fear Street Part 2: 1978. In October of the same year, the horror film Eli starring her was released on Netflix.
She was later cast as the lead role in the drama film Dear Zoe. Filming continued until November in Pittsburgh, Pennsylvania.