Nina Arianda (born Nina Arianda Matijcio; September 18, 1984) is an American film, stage and television actress. She won a Tony Award for Best Lead Actress in a Play in 2012 for Venus in Fur. She was also nominated for another Tony for her performance in Born Yesterday. She starred in Amazon Studios legal series Goliath and starred in the biographical film Stan & Ollie (2018) as Stan Laurel's wife Ida.

Arianda was born Nina Arianda Matijcio on September 18, 1984, in Manhattan, New York. Her parents were born in Germany to Ukrainian families. She grew up in Clifton, New Jersey, and Heidelberg, Germany. She earned a Bachelor of Arts at Eugene Lang College The New School for Liberal Arts and a Master of Fine Arts at New York University's Tisch School of the Arts Graduate Acting Program in 2009