Lenn Kudrjawizki was born on October 10, 1975, in Leningrad, then part of the Soviet Union. That same year, his family relocated to East Berlin in the former GDR for professional reasons. Even before starting school, he began playing the violin, and at the age of six he first appeared on stage with the Leningrad State Ballet. After graduating from a music-focused secondary school—where alongside regular classes he studied acting, singing, and violin—he enrolled at the Dresden University of Music "Carl Maria von Weber" in 1996 to study violin and piano, completing his diploma there in 2002.  

Kudrjawizki made his screen debut in a leading role in Jens Becker's TV drama "Katrin und Wladimir" (1996), about a terminally ill 17-year-old who falls in love with a Ukrainian leukemia patient she meets in the hospital. After several smaller roles—including in the war film "Enemy at the Gates" (DE/FR/UK 2001)—he became a member of the main cast of the crime series "Abschnitt 40," where he appeared from 2001 to 2006. 

He won wide critical acclaim for his performance in Alain Gsponer's graduation film "Kiki & Tiger" (DE/CH 2002), which tells the story of a doomed friendship between an undocumented Kosovar immigrant (Kudrjawizki) and a Serbian living in Germany (Stipe Erceg). For this role, he was nominated for Best Young Actor at the Förderpreis Deutscher Film.  

In addition to "Abschnitt 40," Kudrjawizki appeared in a variety of television productions, such as playing a murder suspect—an Albanian refugee—in the "Tatort" crime drama "Der Prügelknabe" (2003).  

On the big screen, he took on diverse supporting roles: in the offbeat relationship drama "PiperMint …das Leben, möglicherweise" (DE/LU 2003), as a concentration camp prisoner in the Oscar-winning "Die Fälscher" ("The Counterfeiters" AT/DE 2007), as a small-town policeman in the acclaimed social drama "Sieben Tage Sonntag" ("Seven Days Sunday," 2007), and as a priest in the international bestseller adaptation "Die Päpstin" ("Pope Joan" (DE/IT/ES 2009). He has also appeared in international productions, including as a Russian hitman in the Hollywood thriller "Jack Ryan: Shadow Recruit" (US 2014), a gangster boss in "The Transporter Refueled" (FR 2015), and Samuel Malamud, Stefan Zweig's lawyer, in Maria Schrader's award-winning "Vor der Morgenröte - Stefan Zweig in Amerika" ("Stefan Zweig: Farewell to Europe," DE/FR/AT 2016). 

Over the years, Kudrjawizki has also written and directed several short films that screened at festivals. "Thank You, Mr. President" (2009), about a head of state who goes off script at an international summit, won the Murnau Short Film Award. "Business As Usual" (2014), which deals with prejudice against Muslims on the anniversary of 9/11, earned him the Radio Eins Short Film Prize as well as Amnesty International's Human Rights Award.  

Alongside acting, Kudrjawizki has pursued his passion for music, releasing two solo albums—"Lenn – PopArt" (2006) and "Colors of Life" (2016). As a violinist, he has performed with ensembles such as the Leipzig Gewandhaus Orchestra and regularly appears with the Berlin-based band Fiddlaffairs. In 2014, together with Felix Neumann and Stefan Lohmann, he co-founded the Berlin Show Orchestra, which describes itself as the first "sustainably organized orchestra" dedicated to climate-neutral concerts and tours.  

Since 2016, Kudrjawizki has starred in the crime series "Der Kroatien-Krimi," with two new episodes released annually. He has continued to appear in a wide range of TV roles, including as Prince Dir of Novgorod in the sixth season of "Vikings" (CA/IE 2019), as well as in "Marie Brand und der Tote im Trikot" (2020), "Mord in Wien – Der letzte Bissen" (DE/AT 2023), and the TV film "Nelly und das Weihnachtswunder" (2024).  

In 2025, Kudrjawizki returned to the big screen in a leading role after many years: in "Der Kuss des Grashüpfers" ("The Kiss of the Grasshopper"), he plays a writer whose life unravels through conflicts, tragedies, and surreal encounters. The film premiered in the Berlinale Forum in 2025 and was released in German cinemas that August.  

In 2024, Kudrjawizki was elected to the board of the German Film Academy. He is married to musician Nora Kudrjawizki, and their son Lior, born in 2009, has also embarked on an acting career.