Linda Edna Cardellini (born June 25, 1975) is an American actress. In television, she is known for her leading roles in the teen drama Freaks and Geeks (1999–2000), the medical drama ER (2003–09), the drama thriller Bloodline (2015–17), and the dark tragicomedy Dead to Me (2019–present). She also guest starred in the period drama Mad Men (2013–15), for which she received an Emmy Award nomination. Cardellini's voice work includes the animated series Scooby-Doo! Mystery Incorporated (2010–13), Regular Show (2012–15), Gravity Falls (2012–16), and Sanjay and Craig (2013–16).
In film, Cardellini is known for her portrayal of Velma Dinkley in Scooby-Doo (2002) and its sequel Scooby-Doo 2: Monsters Unleashed (2004), and for her supporting roles in Brokeback Mountain (2005), Avengers: Age of Ultron (2015), Green Book (2018), and Avengers: Endgame (2019). She has also starred in the drama Return (2011), earning an Independent Spirit Award for Best Female Lead nomination, the comedies Daddy's Home (2015) and Daddy's Home 2 (2017), and the horror film The Curse of La Llorona (2019).