Thea Saccoliti is an American actress known for her work in voice-over for anime, as well as for her performances in film and television. She is the English voice of Amate Yuzuriha, also known as Machu, the female lead in the 2025 anime series Mobile Suit Gundam GQuuuuuuX.

Originally from Colorado Springs, Colorado, Saccoliti began acting at the age of five after being cast as an Oompa Loompa in a production of Charlie and the Chocolate Factory. Her early career was rooted in theatre, with favorite roles including Little Cosette in Les Miserables, The Blue Fairy in Pinocchio, and Logainne Schwartzandgrubenierre in The 25th Annual Putnam County Spelling Bee. At nine years old, she expanded her focus to include film and television. She appeared in an episode of the Nickelodeon series Game Shakers and had roles in independent films such as the horror movie Tsunambee and Body Keepers.

Saccoliti pursued professional representation in the Los Angeles market at the age of eleven. She graduated from high school early and made the move to Los Angeles at eighteen to fully commit to her acting career. Standing approximately five feet tall, she typically plays characters in the teenage age range. Her skills include ballet, hip-hop, rock climbing, and swimming, and she holds a first-degree black belt in Taekwondo.

In addition to her role in the Gundam franchise, her voice acting credits include the character Karnickle in the 2025 animated film Snow White. She has received training in voice-over and ADR, including studies with instructor Lynnanne Zager. Beyond performing, Saccoliti has been involved in mentorship and youth initiatives, offering guidance on the entertainment industry and mental health.