Nikki Hahn was born in San Antonio, Texas, USA. She began her career in the entertainment industry at a young age, modeling for various campaigns, including Disney, GAP, American Girl, Little Marc Jacobs, and Jessica Simpson kids fashion line.
Before her first television appearance, Nikki enjoyed guest roles in numerous network television shows, including CSI: Miami, NCIS: Los Angeles, The Closer, Criminal Minds, iCarly, and Jessie. She also landed over 28 national campaigns, including two Disneyland commercials and a State Farm commercial with Aaron Rodgers.
In 2011, Nikki starred in a spoof skit on Jimmy Kimmel Live! as the daughter of Tom Hanks in a parody of TLC's Toddlers & Tiaras. The skit went viral, giving her a cult-like comedy following.
Nikki has also demonstrated her acting range in other genres, including horror, when she played the role of a sociopath child killer in American Horror Story. She has also played a lighter role as Selena Gomez's little cousin in The Wizards Return: Alex vs. Alex, a Disney Channel Original Movie.
In 2013, Nikki played young Lucy Hale in Pretty Little Liars and young Mia Mitchell in The Fosters. She has also worked on several comedy satires for Jimmy Kimmel Live! with big names such as Katie Couric and Topher Grace.
In 2015, Nikki landed the role of Emily Cooper in Disney's Adventures in Babysitting, the 100th Disney Channel Original Movie. The movie was directed by John Schultz and executive produced by Michelle Manning, who has become a personal friend and mentor for Nikki.
Nikki has been fortunate to work alongside and learn from Hollywood A-listers such as Jim Belushi, Kyra Sedgwick, Elijah Wood, Elizabeth McCormick, Henry Winkler, Janusz Kaminski, Elisabeth Röhm, Ken Leung, and Two-Time Academy Awards Winners Tom Hanks, Jessica Lange, and Geoffrey Rush.
In 2016, Nikki landed the role of Young Mileva Maric in National Geographic's 10-episode anthology series Genius, season 1, "Einstein". The series earned 10 Emmy nominations in 2017. It was executive produced by Ron Howard and Brian Grazer.
From 2017-2019, Nikki played a recurring role as "Gina Tuscadero" in American Housewife on ABC.