After doing some modeling jobs and television commercials, she was ranked among the five finalists of
Supermodel of the World - Step Brazil, 1989, sponsored by Class Modelos and
Ford Model Agency in the U.S. With the money she earned, she took a course in theater acting. At age 23, she moved from
São Paulo to
Rio de Janeiro. In her first work in 1990, she portrayed Stefânia in the
soap opera A História de Ana Raio e Zé Trovão. The following year, she acted in another soap opera on television,
Amazônia, before moving to
Rede Globo. In 1992, already hired by Rede Globo, she played Nina in
Despedida de Solteiro. A year later, while acting in the soap opera
Olho no Olho, she met director Ricardo Waddington, whom she married; they had a son, Pedro. In 1996, Ranaldi starred in
Fantástico alongside
Pedro Bial, but the role was short-lived because in July of that year, she began appearing as a central character on the soap opera
Anjo de Mim, which was directed by
Ricardo Waddington. As a result of her work with author Manoel Carlos, Ranaldi appeared in:
Laços de Família (2000);
Presença de Anita (2001); and
Mulheres Apaixonadas (2003). In 2002, she portrayed the protagonist in the telenovela
Coração de Estudante, and played in the miniseries
Um Só Coração in 2004. In 2008, Ranaldi appeared in
A Favorita alongside Malvino Salvador. She starred in the telenovela
Fina Estampa, with Carlos Casagrande, Guilherme Leicam and
Tania Khalill in 2012, and in 2014, appeared in
Em Família. In 2015, Ranaldi acted in the series
As Canalhas, from
GNT, and in the
CQC comedy
Band, with
Dan Stulbach. == Personal life ==