Deniz Tajeddin was born in Baku.

She studied violin at the Baku Academy of Music (2011-2015).

She has acted in audiovisual projects as a musician and in plays as an actress.

She has worked as a presenter on Azerbaijani television (2020-2021), on ITV (2022-2024). Since 2025, she has been the presenter of Baku TV.

She starred in the main role in the film “East, for Tea Drinkers” (2013, directed by Stas Rubenchik / Russia) by foreign film producers, in the role of Nino's friend in the film “Ali and Nino” (2015, directed by Asif Kapadia / Great Britain), and in the role of Rosa in the film “Kitchen. The Last Battle” (2017, directed by Anton Fedotov / Russia).

Actress Deniz Tajeddin is the daughter of director Shahira Tajeddin.
Actress Deniz Tajeddin is the wife of actor Zaur Shafiyev.