Jacopo Castagna is an Italian voice actor and singer-songwriter, born on November 15, 1993. He comes from a family with a strong legacy in dubbing; he is the son of voice actress Ilaria Stagni and dubbing director and dialogist Anton Giulio Castagna, and the grandson of voice actors Vittorio Stagni and Lorenza Biella. He began his acting career in 2001 with a small role in the independent film The House of Chicken and started working as a voice actor the following year.

Castagna has built an extensive career dubbing roles for both live-action and animated productions. In anime and animation, he is known for providing the Italian voice for Bertholdt Hoover in the series Attack on Titan. His other notable anime roles include Near in Death Note, Chris Thorndyke in Sonic X, and Kai in Inuyasha: The Final Act. He has also voiced characters in Western animation, such as Remy Buxaplenty in The Fairly OddParents and Aaron in Lego Nexo Knights.

His live-action dubbing work includes voicing Barney Clark in the film Oliver Twist, Freddie Highmore in Arthur and the Minimoys, and Dylan Sprouse in the television series The Suite Life of Zack & Cody. He has also dubbed parts in major films, providing the voice for characters in Batman Begins, Harry Potter and the Goblet of Fire, and Superman Returns. For his role as Pantalaimon in the film The Golden Compass, he was part of an ensemble that won the Young Voice Actors Award at the International Dubbing Grand Prix in 2008.

In addition to his voice acting career, Castagna is a musician. In 2011, he founded the rock music project Le Larve, under which he has released several singles and the albums Non sono d'accordo in 2016 and La versione di un matto in 2024.