Natalia Gastiain Tena (born 1 November 1984) is a British actress and musician of Spanish descent. She played Nymphadora Tonks in the Harry Potter film series, and the wildling Osha in the HBO series Game of Thrones.
She is the lead of the British band Molotov Jukebox, as main vocalist and sings while playing the accordion. The band released their debut album Carnival Flower (2014), in Spring 2014, featuring their single "Neon Lights". Their second studio album, Tropical Gypsy (2016), was released on April 15, 2016 and was preceded by its lead single, "Pineapple Girl". It will be promoted on the band's Tropical Gypsy Tour in April and May 2016.