Isobel Crawley (Penelope Wilton)
Penelope Wilton is a 40-year veteran of stage and screen. Aside from "Downton Abbey," she may be best known for playing Simon Pegg's mum Barbara in "Shaun of the Dead." —XFINITY Entertainment Staff (Photos: ITV/PBS, Larry Busacca/Getty)
The opinions expressed are solely those of the author and do not necessarily reflect the views of Comcast.