Olivia Rodrigo as Grace Thomas, who is nine years old and loves baking. Virginia Madsen as Mrs. Thomas, Grace 's mother who is an elementary school teacher. Eloise Webb as Sylvie, Grace 's French cousin. Caitlin Carmichael as Maddy, Grace 's best friend who loves art. Notlim Taylor as Ella, Grace 's best friend who is a math whiz. Rafael Edholm as Mr. Thomas, Grace 's father who is a therapist. Krisztina Peremartoni as Grace 's grandmother, who co-owns a bakery with her grandfather. András Bálint as Grace 's grandfather, who co-owns a bakery with her grandmother. Fabrice Michel as Bernard, Grace 's uncle who owns a pâtisserie in Paris. Lili Bordán as Sophie, Grace 's maternal aunt who moved to France to study baking and married Bernard. Roxane Bret (fr) as Colette, Bernard 's pastry intern. Thierry Harcourt as Jean - Luc Pernaud, owner of a Paris hotel where Bernard seeks to expand his clientele. Joe Bastianich as himself, one of the judges on MasterChef Junior Baking Edition. Tom Doherty as Josh, Grace 's older brother. Maxime Leigh - Wood as Carter, one of Grace 's competitors on MasterChef Junior Baking Edition.
american girl grace stirs up success cast grace's brother
Tom Doherty