Agnese Marteddu is an Italian voice actress, born in Rome on April 30, 1998. She is primarily known for her extensive work providing the Italian voices for characters in a wide array of animated films and television series, particularly anime. She is the older sister of fellow voice actor Tito Marteddu.

Marteddu's career encompasses a significant number of major roles in internationally renowned animated productions. She is the Italian voice of the titular character in the Studio Ghibli film Ponyo on the Cliff by the Sea. Her other prominent work in anime films includes the roles of Mizore Yoroizuka in Liz and the Blue Bird, Miki Kawai in A Silent Voice, Sayuri Sawatari in The Place Promised in Our Early Days, Senko in Mai Mai Miracle, Ruri Ichigyō in Hello World, and Miach Mihie in Harmony. She also voiced Natalie Woodward in Pompo: The Cinéphile, Juri Andō in Drifting Home, and Lop in the Star Wars: Visions episode Lop & Ochō. Her filmography also includes dubbing work for non-Japanese animated films such as Playmobil: The Movie and early roles in Up and Shrek Forever After.

In addition to films, Marteddu has voiced characters in numerous television anime series. She is the Italian voice of Makeru Yadano in Komi Can't Communicate, Tokiko Hishigata in Summer Time Rendering, Naoko/Gauko in Dino Girl Gauko, and Alisa Cartwright in the Lupin III specials Goodbye Partner and Prison of the Past. Her television work also includes roles in KamiKatsu: Working for God in a Godless World as Mitama, Mix: Meisei Story as Otomi Tachibana, and Arte as Darcia. She provided the voice for Hikari Horaki in the Netflix redub of the seminal series Neon Genesis Evangelion. Her repertoire extends to Western animation as well, including the voice of Anais in the Italian version of The Amazing World of Gumball.

While specific recurring directorial collaborations are not extensively documented, Marteddu's body of work shows a consistent presence in dubs produced for major studios and distributors, including Netflix and Disney Character Voices International. She frequently works alongside her brother, Tito Marteddu, as they have both been featured in the casts of various projects, such as the animated film Snowtime!.

Marteddu's notable achievements include voicing a Studio Ghibli protagonist and building a diverse career that spans multiple genres and formats, from feature films and television series to original net animations (ONA). Her ability to portray a wide range of characters, from comedic roles like Makeru Yadano to more dramatic parts like Mizore Yoroizuka, highlights her versatility as a performer in the field of Italian dubbing.