Born in Leningrad, Lenn initially enjoyed extensive acting, language, piano and violin training in East Berlin, which he successfully completed in 2003 with a diploma. In 1994 Lenn made his television debut with the role of Vladimir in the film "Katrin und Wladimir". This was followed by Jean-Jacques Annaud's "Duel - Enemy at the Gates" and Alain Gsponer's film "Kiki Und Tiger". From 2001 to 2006 Lenn was seen in a leading role in an ensemble in the renowned crime series "Section 40". Since then he has starred in many successful television and cinema productions such as "The Popess", "The Forgers" (2008 Oscar winner for best foreign film) alongside Kevin Costner, directed by Kenneth Branagh, in the Paramount production "Jack Ryan ", in" The Transporter Refueled ", produced and written by Luc Besson, and as a commissioner in the ARD series" Der Kroatien Krimi ".

In 2007 Lenn made his directorial debut with his short film "Today Is My Day". His second work as a director "Thank You Mr.President" (2009) successfully toured international festivals and won the coveted Murnau Prize. Both films were given the label "Prädikat valuable". In 2014 Lenn shot his third short film "Business as usual - The Prophet flies with you", for which he was awarded the Amnesty International Human Rights Prize, among other things.

In addition to all of this, he founded the first sustainable orchestra "The Berlin Show Orchestra" with his company Legrain Productions and is committed to reducing CO2 through the sustainability concept.

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::: Winner Radio Eins short film role 2014 for BUSINESS AS USUAL

::: Humanrights Award from Amnesty International 2014 for BUSINESS AS USUAL

::: Audience Award DC Film Festival Washington 2014 for BUSINESS AS USUAL

::: Max Ophüls Festival: Nomination 'Best Short Film' for THANK YOU MR. PRESIDENT (director, co-writer, producer)

::: Murnauer short film award for THANK YOU MR. PRESIDENT (director, co-writer, producer)

::: New York City Short Film Festival: Nomination 'Audience Award' for THANK YOU MR. PRESIDENT (director, co-author,  Producer)

::: First Steps Award: Nomination 'Best Short Film' for THANK YOU MR. PRESIDENT (director, co-writer, producer)

::: ITVA Award in bronze for THANK YOU MR. PRESIDENT (director, co-writer, producer)

::: 45th Monte Carlo Television Festival: Nomination 'Best Ensemble' for SECTION 40

::: German Film Award: nomination 'Best Young Actor' for KIKI & TIGER