Linda Cardellini

Linda Edna Cardellini (born June 25, 1975) is an American actress. She is known for playing Lindsay Weir on "Freaks and Geeks" (1999–2000), Samantha Taggart on "ER" (2003–09), and Meg Rayburn on "Bloodline" (2015–17). 
Cardellini is also known for her role as Velma Dinkley in the "Scooby-Doo" live-action movie series (2002–04).
Cardellini's voice work includes CJ from "Regular Show", Wendy from "Gravity Falls", Megan from "Sanjay and Craig" and Agu Linerio from "Acceptable Mountain".