Jessica Brown Findlay: http://www.imdb.com/name/nm3726887/

I can't say much about her other stuff, but she was in two episodes of Misfits as a prim Christian girl. Very uptight, proper looking, and she's got the fullest lips I've ever seen. I think she was also in a period drama?

screencap of her in misfits: http://tv.rawr-caps.net/displayimage.php?album=492&pid=245290#top_display_media