Topless tweet haunted Alison Pill for months

Alison Pill is still cringing about her accidental topless tweet and she's convinced everyone she meets has seen the photo of her boobs.

The Newsroom star stunned her thousands of followers last September (12) when she uploaded a candid snap meant for her then-fiance Jay Baruchel to her page on the social networking site.

Pill, who is no longer engaged to funnyman Baruchel, has now opened up about her naked photo shame.

She tells talk show host Conan O'Brien, "I had one of these pictures on my phone because I had been away from my, at the time, fiance... I'm still trying to understand what happened. It's a fascinating story, involving not knowing that my new BlackBerry had a touch screen and responding to somebody on Twitter like, 'Oh yeah, New York was great, it's 9.30 on a Wednesday, also, apropos of nothing, here are my boobs!' It's a dumb thing to do, I suppose."

And the 27 year old admits the embarrassing moment haunted her for months afterward: "Anytime I met a new person I (kept thinking), 'Boobs! Nice to meet you, you've seen my boobs.'"

Pill and Baruchel were planning to marry last year (12), but the Canadian couple called off the wedding amid reports the long-distance relationship was too difficult to manage.