Marta Etura Palenzuela is a Spanish film and television actress. She is known for Your Next Life (2004), Cell 211 (2009), Sleep Tight (2011), and The Invisible Guardian (2017).

Cell 211 is a 2009 Spanish-French prison film directed by Daniel Monzón from a screenplay by Monzón and Jorge Guerricaechevarría and based on the 2003 novel of the same name by Francisco Pérez Gandul. The film stars Luis Tosar, Alberto Ammann, Antonio Resines, Manuel Morón, Carlos Bardem, Luis Zahera, Vicente Romero, Fernando Soto, and Marta Etura. In the film, rookie prison guard Juan Oliver (Ammann) is forced to go undercover as a prisoner after he becomes embroiled in a riot led by Malamadre (Tosar).