Brianna Caitlin Hildebrand is an American actress. She is best known for appearing as Negasonic Teenage Warhead in the films Deadpool (2016), Deadpool 2 (2018), and Deadpool & Wolverine (2024). She is also known for appearing in the web series Annie Undocumented, and as the character Aurora in the Netflix show Lucifer. She also portrayed Elodie Davis in the show Trinkets.