Joana Isabel de Alvim Ribeiro (March 25, 1992) is a Portuguese actress and model.

Joana Ribeiro was born on 25 March 1992 in Lisbon, Portugal to an engineer father and veterinarian mother. She studied first at the Luís Madureira School in Alfragide, and then completed secondary studies in Lisbon. Ribeiro initially studied architecture, but changed her focus to acting. She signed with an agency, Lisbon Elite, and played in the short film Herança do Silêncio (Silent Inheritance).

Ribeiro's breakout role was as Mariana Côrte-Real in the telenovela Dancin' Days. Her next role was in another telenovela, Sol de Inverno (Winter Sun). She was cast as Susan Delgado in Amazon Prime Video's cancelled 2020 The Dark Tower series.

Internationally, she's acted in The Man Who Killed Don Quixote (2018) by Terry Gilliam, Fatima (2020) by Marco Pontecorvo (in which she played Our Lady of Fátima), Infinite by Antoine Fuqua (2021) and The Man Who Fell to Earth by Alex Kurtzman and Jenny Lumet (2022).

She was one of the ten "Shooting Stars" at the Berlin Film Festival in 2020.