Maisie Williams, who plays the fierce Arya Stark on HBO’s hit show Game of Thrones, sent two of the biggest fandoms to date into a frenzy when she posted a selfie on Instagram from her time at Comic-Con San Diego with none other than Harry Potter himself, Daniel Radcliffe.

I think this photo is gonna make the world implode….. Last night was really great #sdcc2015

A photo posted by @maisie_williams on Jul 12, 2015 at 11:01am PDT

Joining in on the magic was Maisie’s Game of Thrones costar Hannah Murray who plays Gilly and Doctor Who‘s Jenna Coleman.

Well aware of how giddy the picture would make fans and sharing her own excitement Maisie captioned the photo, “I think this photo is gonna make the world implode…. Last night was really great #sdcc2015.”

The two met once before back in May when Harry Potter‘s Matthew Lewis, who played Neville Longbottom in the film series, posted an Instagram selfie alongside Emilia Clarke, who plays Daenerys Targaryen on Thrones. The two are costarring in the film adaptation of Jojo Moyes novel Me Before You.