Jella Haase was born October 26, 1992 in Berlin Kreuzberg. As a child, she already acted in stage productions, and after appearances in short films, she made her feature film debut in a memorable supporting role in the TV production "Mama kommt!". This was followed by more TV roles in "Polizeiruf 110 – Tod im Atelier" (2009), the comedies "Liebe in anderen Umständen" (2009) and "Meine Familie bringt mich um" (2010), and Eoin Moore's "Polizeiruf 110 – Einer von uns". She also was a regular cast member of the experimental miniseries "Alpha 0.7 - Der Feind in dir" (2010).

Jella Haase had her first major screen role in the drama "Lollipop Monster" (2011), playing a teen with a troubled family background. The same year, she embodied a girl who joins a right-wing extremist gang in "Kriegerin" ("Combat Girls"), and her performance garnered her a Best Actress nomination at the 2011 Förderpreis Deutscher Film. Moreover, she won the 2011 Bavarian Film Award for Best Newcomer for "Lollipop Monster" and "Kriegerin". The following year, Haase starred opposite Corinna Harfouch as a young addict in "Puppe", and also had a cameo in David Dietl's "König von Deutschland" ("King of Germany"). She then guest-starred as an underage prostitute in an episode of "Tatort", which won her the Günter-Strack-Fernsehpreis for Best Actress.

Displaying her comic talent as well, she played a bratty teen girl in the box office hit "Fack ju Göhte" ("Suck Me Shakespeer"). Her performance in the comedy garnered her a nomination for the 2014 German Film Award. She displayed her softer side as sad Princess Luise in the TV adaptation of the fairy tale "Die goldene Gans" (2013). Haase went on to guest star in the TV shows "Helen Dorn" (2014) and "Der Kriminalist" (2014), followed by a turn as a hip Berlin girl who guides her new Swedish roommate through the big city in the Swedish production "Unga Sophie Bell" (2014).

After a memorable supporting role in the international miniseries "The Team" (2015), Haase joined the ensemble cast of "Die Klasse - Berlin '61" (2015). She next reprised her iconic role as feisty high school student Chantal for the sequel "Fack Ju Göhte 2" (2015). Following her part as maid Tinette in Alain Gsponer's adaptation of "Heidi", Haase was one of the leads of the drama "Vier Könige" ("Four Kings"), in which four troubled teens have to spend Christmas in a psychiatric ward.

For "Fack Ju Göhte 2" ("Suck Me Shakespeer 2") she was awarded with the young actor prize (together with Lena Klenke and Gizem Emre) at the Bavarian Film Award 2016. Shortly before she was one of the "European Shooting Stars" of the European Film Promotion at the Berlinale 2016. Jella Haase received much critical praise for her performance in the drama "Looping" (2016), as a 19-year-old who begins a special relationship with two older women in a psychiatric hospital. On TV, Haase starred in a leading role as a police trainee in the "Tatort" episode "Auf einen Schlag" (2016), followed by a supporting role in the coming-of-age feature film "Nirgendwo" ("Nowhere", 2016). At the Munich Film Festival 2017, the TV film "Das Leben danach" (2017) premiered, with Haase in the leading role of a survivor of the tragedy at the Duisburg Love Parade 2010. Much lighter fare was "Fack Ju Göhte 3" ("Suck Me Shakespeer 3", 2017), for which she once again took on the role of the pupil Chantal.  

She also had a leading role as an aimless teenager on an adventurous road trip in the comedy "Vielmachglas" ("A Jar Full of Life", 2018); in Markus Goller's road movie "25 km/h" (2018) she appeared in a supporting role as a hitchhiker. In the much-praised tragicomedy "Die Goldfische" ("The Goldfish", 2019), also a road movie, Haase's character accompanies a group of disabled people on an eventful journey.

In 2019 she played the title character in the thriller "Kidnapping Stella", about a young woman who involves her two kidnappers in a dramatic psychoduell (the film is a remake of the British production "The Disappearance of Alice Creed" from 2009). The comedy "Das perfekte Geheimnis" ("The Perfect Secret", 2019) by Bora Dagtekin was also a remake. Based on the Italian hit film "Perfetti Sconosciuti" (2016), the film told the story of a dinner party whose participants have fun sharing all the messages and calls received on their mobile phones with those present - with embarrassing consequences. Haase played the newest and youngest member of the group of friends in the big box office success.

At the Berlinale 2020 two films starring Jella Haase celebrated their world premiere: In Burhan Qurbani's contemporary adaptation of "Berlin Alexanderplatz" she played Mieze, in Leonie Krippendorff's coming-of-age story "Kokon" ("Cocoon") she portrayed the new, self-confident friend to a quiet teenager standing in the shadow of her older sister.

In November 2021, the biographical portrait of the writer, director and provocateur Thomas Brasch, "Lieber Thomas" ("Dear Thomas"), was released in German cinemas. In it, Haase plays Brasch's great love Katharina Thalbach, who accompanied the banned poet to West Germany in 1976. In 2022 Haase was seen in the film drama " Bis wir tot sind oder frei" ("Caged Birds") by Swiss director Oliver Rihs as a left-wing autonomist.