Astrid Whettnall (née Ullens de Schooten Whettnall, known as Astrid Whettnall; born 17 March 1971) is a Belgian stage and film actress. She studied at the Kleine Academy in Brussels and began working in theatre. Her film credits include Capital (2012), In the Name of the Son (2012), Salaud, on t'aime (2014), Yves Saint Laurent (2014), Marguerite (2015), and Close Enemies (2018).

She received the Magritte Award for Best Actress for her work in Road to Istanbul (2016).