Linda Cardellini

Linda Edna Cardellini (born June 25, 1975) is an American television and film actress. She is known for her television roles Lindsay Weir on Freaks and Geeks, Samantha Taggart on ER, as well as the voices of Hot Dog Water on Scooby-Doo! Mystery Incorporated and Wendy on Gravity Falls, and the film role of Velma Dinkley in the live-action Scooby-Doo theatrical films. On April 7, 2013, she began the recurring role of Sylvia Rosen, neighbor of Don Draper, on Mad Men.