Maisie Williams, who plays Arya Stark on HBO's Game of Thrones, surprised a handful of UCLA students by crashing their Season 6 premiere viewing party on Sunday.

Williams documented the whole thing on her Instagram account in a series of posts, starting with a photo of a tweet she posted, asking UCLA students to share pictures of their Game of Thrones viewing parties, promising a special surprise in return.

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Shortly after sending out the tweet, Williams came across a couple of film students, Mark and Kate, who were having a Game of Thrones-themed viewing party ahead of the highly-anticipated premiere of the fantasy drama's sixth season and went to pick up snacks for the shindig.

"I found a couple, Mark and Kate, film students, who were throwing a party at their apartment, with a few friends. So at 8pm we left the hotel to go get snacks," wrote Williams.

After grabbing snacks for the party, she made her way to the apartment building where the party was taking place, only to realize that the buzzer was broken.

"Firstly, I met Mark. The buzzer was broken so Mark came down to let us in. After exhaling a 'HOLY SHIT!,' we hugged it out and he helped us inside," she captioned a photo of herself and Mark locked in an embrace.

"Mark and I devised a cunning plan. He would enter first declaring that they had won the GoT swag (this was a ploy we made up to throw people off the scent) and I would follow after hoping and praying that everyone would actually recognise me," Williams continued.

Mark and Kate friends couldn't believe their eyes when they saw Arya Stark herself, walking through the door, holding bags of chips and popcorn.

Williams shared snapshots of the cool GOT-inspired decorations and snacks at the party, placing her bets on Jon Snow's fate and relishing the dragon egg cookies, which she described as "THA BOMB" before posing for a group picture with the students.

Here's how it all went down:

 (1/12) This commences my photo story. Earlier today I put this out to everyone on Twitter... I wanted to find some unsuspecting fans and surprise them with drinks and snacks before the premiere episode tonight...

A photo posted by @maisie_williams on Apr 24, 2016 at 9:49pm PDT

(2/12) I found a couple, Mark and Kate, film students, who were throwing a party at their apartment, with a few friends. So at 8pm we left the hotel to go get snacks. A photo posted by @maisie_williams on Apr 24, 2016 at 9:52pm PDT

 (3/12) We saw (on Twitter) that Mark and Kate had already made Game of Thrones themed snacks, and decorated their apartment, but who doesn't love extra popcorn and crisps?

A photo posted by @maisie_williams on Apr 24, 2016 at 9:55pm PDT

(4/12) SNACKS DONE. We were on our way to surprise our lovely fans! A photo posted by @maisie_williams on Apr 24, 2016 at 9:56pm PDT

 (5/12) We could hear the party inside so we had to be REALLY quiet!

A photo posted by @maisie_williams on Apr 24, 2016 at 9:57pm PDT

(6/12) Firstly, I met Mark. The buzzer was broken so Mark came down to let us in. After exhaling a "HOLY SHIT!", we hugged it out and he helped us inside. A photo posted by @maisie_williams on Apr 24, 2016 at 9:59pm PDT

 (7/12) Mark and I devised a cunning plan. He would enter first declaring that they had won the GoT swag (this was a ploy we made up to throw people off the scent) and I would follow after hoping and praying that everyone would actually recognise me.

A video posted by @maisie_williams on Apr 24, 2016 at 10:05pm PDT

(8/12) My favourite part is how excited they sound to win the swag, little did they know, I was just around the corner... A video posted by @maisie_williams on Apr 24, 2016 at 10:07pm PDT

 (9/12) They had the coolest Game of Thrones decorations, but this was my favourite. My money's on dead, it seems I'm outnumbered.

A photo posted by @maisie_williams on Apr 24, 2016 at 10:09pm PDT

(10/12) I went there to surprise them with snacks, but when I got there, I found myself trying one of every single snack they had made. A photo posted by @maisie_williams on Apr 24, 2016 at 10:11pm PDT

(11/12) They were catching up on the last episode of Season 5 when I went in, and we all giggled nervously as we took pictures during the famous "shame" scene. I had the most amazing time, everyone was so welcoming and excited... Thanks to Mark, Kate and company for having us in your lovely flat. Enjoy the rest of Season 6. A photo posted by @maisie_williams on Apr 24, 2016 at 10:16pm PDT

 (12/12) Ps. Thanks for the dragon egg cookies, they were THA BOMB

A photo posted by @maisie_williams on Apr 24, 2016 at 10:17pm PDT

TagsGame of Thrones, Maisie Williams, Game of Thrones season 6, Game of Thrones viewing party, Game of Thrones party, UCLA, Maisie Williams UCLA