She's not leaving.
Speaking at the NTAs earlier this week:
http://link.brightcove.com/services/...ctid1889922443
(Fast forward to 2:25)
The only article I can find about her quitting to become an actress is from Pre-BB9 -
http://www.thisisbigbrother.com/foru....php?tid=82189 - and she's denied it countless times since.
Also, it's easy to forget that while it's a Teletext article, it's actually covering a story in the News Of The World, who aren't exactly renowned for being 100% reliable.