What happened when Hayley Atwell gatecrashed Billie Piper's Twitter Q&A

https://twitter.com/billiepiper/status/618507106866565120

We were excited. Why? Because the former Doctor Who actress has form when it comes to social media, spilling the beans about her secret stash of green catsuits and worrying addiction to Friends the last time she answered your questions.

But yesterday it wasn't just fans getting involved. As #AskBillie picked up pace, one user quizzed her on what she loved about actress Hayley Atwell...

https://twitter.com/billiepiper/status/618513587733200897

https://twitter.com/billiepiper/status/618513680829947905

Not one to miss out on the fun, Atwell soon got involved, tweeting her friend a cryptic question.

@billiepiper would you ever descend down a 30ft wall with two tied sheets then wonder how to get back up? #AskBillie

— Hayley Atwell (@HayleyAtwell) July 7, 2015

https://twitter.com/billiepiper/status/618518713831194624

True or not, perhaps the answer is in Billie's response to the next question – what is the strangest rumour you've ever heard about yourself?

https://twitter.com/billiepiper/status/618519882951487489

In fact, Hayley Atwell was a running theme of the Twitter Q&A. Does Billie get starstruck by famous folk? Errrr...

https://twitter.com/billiepiper/status/618520116700020736

Louis C.K. also got a fair bit of airtime on Billie's account. He helps her pass the time when she's travelling...

https://twitter.com/billiepiper/status/618510727087792128

Who would she want to be stuck in a room with for the rest of her life? No surprises here.

https://twitter.com/billiepiper/status/618516917368791040

Question of the evening has to go to @jonnieboyo who asked Billie: Would you walk 500 miles to give Tennant another kiss, to which the answer was...

https://twitter.com/billiepiper/status/618521305067978752

But don't expect that smooch to take place with Tennant's DI Hardy as the actress isn't interested in joining the long list of Doctor Who actors who've appeared in Broadchurch.

https://twitter.com/billiepiper/status/618511615827308544

Before she signed off, Billie shared a few extra nuggets of juicy info, such as her favourite nickname for her husband...

https://twitter.com/billiepiper/status/618523680415596544

... plans to return to the stage in 2016...

https://twitter.com/billiepiper/status/618511193129492480

... and her dream of working with Samantha Morton. Now THAT we'd like to see.

https://twitter.com/billiepiper/status/618524479308865536

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