[1] Born in Milan and the daughter of actors Vittorio Stagni and Lorenza Biella, Stagni began her career in the 1980s.
Stagni is typically known for her dubbing of male children, being the official Italian voice for Bart Simpson in The Simpsons from 1991 until 2012 (when she was replaced by Gaia Bolognesi) and among the most popular characters she dubbed are Macaulay Culkin as Kevin McCallister in Home Alone and Barret Oliver as Bastian Balthazar Bux in The Neverending Story.
[2] In her animated roles, Stagni voiced Jessie in the Toy Story franchise, the title character in Pocahontas, Terk in Tarzan and Jerry in Tom and Jerry: The Movie.
[3] Among the actresses Stagni has dubbed there are Jennifer Lopez, Winona Ryder, Eva Longoria, Charlize Theron, Lauren Graham, Mira Sorvino, Jessica Biel, Samantha Morton and more.
Stagni is the ex-wife of the late dubbing director Anton Giulio Castagna.