Marina Souza Ruy Barbosa (born 30 June 1995) is a Brazilian actress. Barbosa started off her career as a child actress with her first major role was in the telenovela Começar de Novo.

Following the latter, she received an invitation to audition for "Sabina", a prominent character in the telenovela Belíssima, both by Rede Globo. Later, she portrayed the character "Isabel" in Sete Pecados. Portraying the rebellious Vanessa in Escrito nas Estrelas, Marina had the idea to create the zipper earrings used by the character, an accessory that would eventually become a fad among Brazilian teenagers.