Yes- according to her Facebook profile, anyway. Here's the announcement she made at the beginning of April:
"Something for the Fans: I’ve always tried to be as open and honest with my fans (and onlookers) as much as possible. With the way social media has progressed, a lot of personalization has been lost. The purpose of this is to address the elephant in the room, and to thank all of you.
It’s become quite evident that my time as an adult film performer has expired. Don’t worry, I haven’t found Jesus. One thing is for certain, I’m proud to say I have no regrets, I genuinely feel I accomplished everything I could as a performer. I was able to work with the industry’s most professional performers and companies, and I’ll always cherish the friends and relationships I was able to build. It was simply the perfect time for me to move on while I was on top (pun indeed, intended). Life sometimes takes us in a direction we never could have imagined."
The (now ex-) porn star turned mainstream actress went on to 
hype the release party for her new photo book, Neu Sex, which purports to "turn the lens on the wild world [Sasha] inhabits." With one movie just completed, one in post- and one in pre-production, it does look as if Sasha (or Marina Ann Hantzis, as her birth certificate calls her) has her hand in many non-porn projects at the moment. So it may be a while before we see her hand in Belladonna's back door again, but Sasha is certainly not shy about stripping down for "mainstream" parts- just check out The Girlfriend Experience and Entourage. Sasha Grey is dead. Long live Sasha Grey!
Give a one-handed salute to the porn career of Sasha Grey right here on MrSkin.com!
