Alexa Nisenson

Alexa Nisenson (born June 8, 2006) is an American actress, best known for playing Charlie on the AMC horror drama television series Fear the Walking Dead (2018–2023).

Career Nisenson began acting professionally at the age of eight years old and made in 2015 her television debut on NBC's Constantine as Geraldine Chandler. A year later, in October 2016, she made her feature film debut in the film Middle School: The Worst Years of My Life. For her role in this film, she received in 2017 an award in the category Best Performance in a Feature Film – Supporting Young Actress at the 38th edition of the Young Artist Award. After this she appeared in the film Fist Fight, and in the television series Good Behavior and Will & Grace.

In April 2018, Nisenson made her debut as the character Charlie in the AMC post-apocalyptic horror drama television series Fear the Walking Dead. Her character was a recurring character in the fourth season, but was promoted to series regular for season five. She was seen as a regular until the end of season seven in 2021. She made a one-time return in season eight in 2023. In between, from July 2018 to August 2023, Nisenson provided the voice of Alexa Mongello on the Cartoon Network series Summer Camp Island. She also appeared in the lead role of Shelly in the film Orphan Horse in 2018, starring alongside Academy Award-winner Jon Voight.

Following this, Nisenson provided the voice of Jess in the podcast series Discovering Dad in 2024 and played the role of Young Harriet Parker in the CBS series NCIS in 2025.

Filmography Film Year Title RoleNotes 2016 Middle School: The Worst Years of My Life Georgia Khatchadorian

Podcast Year Title Role Notes 2024 Discovering Dad Jess Voice role 2017 Young Artist Award Best Performance in a Feature Film – Supporting Young Actress