Mustin completed his theater studies at the Institut des Arts de Diffusion in Louvain-la-Neuve in 2012. Soon after, he started working on the French TV series “À tort ou à raison,” directed by Alain Brunard. On the theatrical front, he was cast as Benvolio in “Romeo and Juliet,” a production helmed by Yves Beaunesne, which was instrumental in inaugurating the new Théâtre de Liège.
In late 2014, Mustin directed the play “Débris” by Dennis Kelly, showcased at the Riches-Claires in Brussels during November and December.
By early 2015, he was involved in “L’Auberge du Cheval-Blanc,” a show revived under the direction of Dominique Serron and performed at Charleroi’s Palais des Beaux-Arts and the Royal Opera of Wallonia. Mustin’s filmography expanded as he featured in two movies and a TV show. He co-starred with Romain Duris and Gustave Kervern in “Odd Job” (2016), a film by Pascal Chaumeil, and with Fabrizio Rongione in “Les Survivors,” a project directed by Luc Jabon. On TV, Mustin took up the role of Kevin in “The Break,” a series by Matthieu Donck that was well-received in Belgium.
2014 also saw Mustin signing with the Black Gizah Record label, owned by Kid Noize. His debut single “The Golden Age” gained traction on several Belgian radio channels in both Flanders and Wallonia.
At the 2016 D6bels Music Awards, Mustin garnered six nominations, spanning categories like Male Solo Artist, Concert, Pure FM Artist/Group, Revelation, Music Video, and Songwriter. He clinched the award for Revelation of the Year.
His achievements didn’t stop there. In 2019, he was honored with the Magritte Award for Most Promising Actor for his role in “The Royal Exchange.” Later that year, he earned a nomination at the Prix de la critique for Male Revelation (Espoir masculin).
In 2020, Mustii teamed up with Brut for a collaboration single, “Time is up”. On January 21, 2022, he released his second album, “It’s happening now”. The album reached the 4th place in the Belgian album charts. The song “Skyline” became a hit.