Sarah Chalke (/ˈtʃɔːk/; born August 27, 1976) is a Canadian actress. She is known for portraying Dr. Elliot Reid on the NBC/ABC comedy series Scrubs, the second Rebecca "Becky" Conner on the ABC sitcom Roseanne, Stella Zinman on the CBS sitcom How I Met Your Mother, and Beth Smith on Adult Swim's adult animated science fiction series Rick and Morty. She also had a recurring role on the third season of the ABC/TBS sitcom Cougar Town.