Born in 1973 in Kaunas. 1996 graduated from Lithuanian Music Academy, where he had studied acting under Dalia Tamuleviciute and Vladas Bagdonas.
He is one of the leading actors of OKT/Vilnius City Theatre. Gavenonis created several leading roles in the Theatre’s productions, directed by Oskaras Korsunovas: Robbie in Mark Ravenhill’s Shopping and Fucking, 1999, Paul in Marius von Mayenburg’s Fireface, 2000, Bezdomny in Mikhail Bulgakov’s The Master and Margarita, 2000, Ringo in M. von Mayenburg’s Parasites, 2001, Oedipus in Sophocles’ Oedipus Rex, 2002, Paris in Romeo and Juliet by W.Shakespeare, 2003, Father in the Presnyakov brothers’ Playing the victim, 2005, Claudius in Hamlet by W.Shakespeare, 2008.
Awarded as Best drama actor by Lithuanian Ministry of Culture for Ringo (in 2002) and Oedipus (in 2003).