Dagmara Domińczyk (born July 17, 1976) is a Polish-American actress and author. She has appeared in the films Rock Star (2001), The Count of Monte Cristo (2002), Kinsey (2004), Trust the Man (2005), Lonely Hearts (2006), Running with Scissors (2006), Higher Ground (2011), The Letter (2012), The Immigrant (2013), Big Stone Gap (2014), A Woman, a Part (2016), The Assistant (2019), and The Lost Daughter (2021). Domińczyk also had a main role in the HBO comedy-drama television series Succession (2018–2023).