Elizaveta Nikolaevna Arzamasova is a Russian theatre and film actress, singer, and TV presenter. She was born in Moscow. After her birth she lived with her parents for several months on Vasilyevskaya Street, then the family moved to Pokrovka. At the age of four she began acting in films. At the same time she studied at a music studio at GITIS. Her mother, Yuliya Arzamasova, posted photos and a resume of her daughter on one of the websites. Arzamasova passed the casting at the Moscow Theatre of Estrada and received the main role in the musical Annie. In 2004, at the 9th theatre festival Moscow Debuts, Arzamasova was awarded the audience sympathy prize for this role. In 2005 she made her debut on the stage of the Moscow Academic Musical Theatre Novaya Opera in the role of the young Anastasia Romanova in the opera Anastasia. In 2007 she played the role of the girl-Jesus in the Moscow Art Theatre production of The Pillowman (directed by Kirill Serebrennikov). In 2012 she enrolled at the M.A. Litovchin Humanitarian Institute of Television and Radio Broadcasting (GITR) in the producing department, from which she graduated with honours. Since 20 December 2020 she has been married to figure skater Ilya Averbukh.

On 14 August 2021 the couple had a son. In 2016 she became a trustee of the Old Age in Joy foundation. The foundation supports the elderly and people with disabilities. In October 2019, at the Bulgakov House museum-theatre, a performance based on Elizaveta's play If I Had Been... was staged, and the proceeds from ticket sales were donated to the Old Age in Joy foundation. She gained popularity after playing one of the main roles - the erudite and child prodigy Galina Sergeevna Vasnetsova in the TV series Daddy's Girls on the STS channel. In 2010 she played the role of Juliet in the play Romeo and Juliet on stage with Filipp Bledny (Romeo). Arzamasova's first performance took place on 30 January 2010, so she first played Juliet at the age of 14. In the same year she sang and appeared in the music video I Am Your Sun. In 2012, Arzamasova voiced the main character of the Disney/Pixar animated film Brave, Merida. In 2013 she voiced Juliet in the 2013 film Romeo and Juliet. She voiced one of the main characters of the animated film The Angry Birds Movie 2, Silver. In 2017 she became the face of the STS Love channel.