Broadcasting bosses at the Beeb boobed earlier this week when a reporter behind a news anchor was spotted watching a woman remove her bra on a computer screen.
"My breasts! So amusing on so many levels", Anna tweeted alongside a news report about the steamy bulletin interruption.
'Now that I know what you guys were talking about this some of the funniest s**t I have seen in a while!
Image caption Anna played the lead character in HBO's supernatural drama True Blood
The Hollywood actor, who appeared in the X-Men films, revealed it was a sex scene from hit TV show True Blood and seemed perfectly relaxed about the unexpected exposure. "Thanks for the giggle!"
The network has yet to determine how the scene kept playing behind news presenter Sophie Raworth. Paquin got her husband and co-star Stephen Moyer involved, writing to him on the social media site: "Isn't it hilarious babe?"
The BBC issued a statement afterwards, saying that they were investigating the incident and were "establishing the facts". "What's there to look into my t**s photobombed the news because someone was watching #trueblood in view of camera", Paquin responded, to which a fan pointed out that the 35-year-old could now use the phrase "photoboobed".
True Blood drew to a close after seven seasons in 2012.