Liza Simmerlein is a German actress and voice actor born in Hamburg in 1991. Her career began in performance from a young age, with involvement in children's theater and the Backstage youth club at the Deutsches Schauspielhaus Hamburg. After completing her Abitur, she trained at the Freie Schauspielschule Hamburg, graduating with special distinction in 2014. Following her studies, she gained experience across multiple German theaters, including the Kreuzgangspiele Feuchtwangen, Theater Paderborn, Landesbühne Niedersachsen Nord, and various Hamburg venues such as the St. Pauli Theater, Altonaer Theater, and Ernst Deutsch Theater.

Since 2018, Simmerlein has been active as a voice actor and speaker for audio plays and documentaries, working in Hamburg, Berlin, and Potsdam. Her voice work encompasses a wide range of productions, including animation, television series, and video games. In the realm of anime and animation, she is known for providing the German voice for Carla Vargas in the series How a Realist Hero Rebuilt the Kingdom. Her other anime and animation voice roles include Sandy in Die Häschenschule - Der große Eierklau and a role in Grisaia Phantom Trigger: The Animation. She also voiced the character Pumafell 2 in the animated film Yakari - Der Kinofilm.

Beyond anime, Simmerlein's voice acting credits demonstrate her versatility. She has voiced characters in live-action series such as Tina Rodriguez in the FOX series Deputy, Cindy Anderson in Betty in New York, and roles in productions like The Little Drummer Girl, Designated Survivor, and Kommissar Caïn. Her work also extends to popular children's series, where she voiced Die Gepardin in Paw Patrol. In the video game sector, she has contributed her voice to major titles including League of Legends and Legends of Runeterra for Riot Games, as well as Endzone. Her audio work includes speaking roles for Hörspiel series such as Die Drei!!!, Punkies, and Teufelskicker.

Simmerlein is also an accomplished stage actress, with a extensive list of theater credits that includes leading roles such as Pippi Langstrumpf, Julia in Romeo und Julia, the title role in Die kleine Hexe, and Gretel in Hänsel und Gretel. Her skills extend to singing, with a soprano voice and proficiency in musical, chanson, and pop, and she released a debut single titled Set me free in 2016. She also has training in various dance styles and stage combat.