Pill later deleted the tweet, but too late: once something is on the Internet, it stays on the Internet, as seen above in censored form.
[If you wish to see the uncensored version, you can go here.]
As she later tweeted, she actually meant to delete the image. It's not sure how that was supposed to work, but she posted:
"Yep. That picture happened. Ugh. My tech issues have now reached new heights, apparently. How a deletion turned into a tweet... Apologies."
Many didn't find an apology necessary. The photo, which shows Pill from the waist up wearing only rather un-sexy glasses, doesn't really require an apology.
Her fiancé, actor Jay Baruchel, found the events amusing, tweeting:
"My fiancée is an hilarious dork. #imjustgladitdidnthappentomefirst. Smartphones will get ya."
It's not the first such tweet in recent memory. It's also not always the woman who tweets such mistakenly nude images. In November of last year, Tori Spelling's husband Dean McDermott tweeted a photo showing her topless, in the background.