[1] After attending evening classes at Cours Florent, a private drama school in Paris, France, Lavernhe began taking free classes at Cours Florent, studying under the direction of, among others, Jean-Pierre Garnier and Loïc Corbery.

[2] He began his acting career in 2008 by entering the Conservatoire national supérieur d'art dramatique.

His first major role in theater came in 2011 when he played the role of Benvolio in a staging of the romantic tragedy Romeo and Juliet by William Shakespeare, directed by Olivier Py.

He was nominated for two Molière Award: in 2018 for his lead role in Scapin the Schemer, directed by Denis Podalydès and in 2023 for his supporting role in The Lady from the Sea, directed by Géraldine Martineau.

He was also nominated three times for a César Award: once in the category Most Promising Actor for playing Pierre in C'est la vie!, directed by Éric Toledano and Olivier Nakache, and twice in the category Best Supporting Actor for Love at Second Sight directed by Hugo Gélin and My Donkey, My Lover & I directed by Caroline Vignal.