Evanna Lynch and Matthew Lewis recently met up with none other than Ariana Grande when the pop star performed in London. We’re not jealous or anything.

Ariana Grande has made no secret of the fact that she’s a Harry Potter fan — and a Slytherin through and through — and this week, she had a chance to meet up with a few Potter cast members who came to see her perform at the O2 in London.

Related: Bonnie Wright shares cute Harry Potter reunion picture

Evanna Lynch (Luna Lovegood) and Matthew Lewis (Neville Longbottom) apparently surprised Grande in her dressing room while Harry Potter and the Deathly Hallows was playing, leading to this great group shot:

The “Sirius” she’s referring to in the picture is actually her recently acquired puppy, whom she named after the beloved Harry Potter character whose Animagus form is a dog.

Lynch and Lewis also both posted selfies with the pop star:

Chilling backstage at the O2 and look who rocked up… @arianagrande totally killed it last night!

A photo posted by Matt Lewis (@realmattdavelewis) on

Ariana’s brother Frankie was on hand to prove to the Harry Potter alums just how seriously obsessed the Grande family is with the series…

Matt Lewis made headlines last week when he posed shirtless for a magazine cover, and woke the motherly instincts in Harry Potter author J.K. Rowling.

Meanwhile, Evanna Lynch recently penned a powerful letter to her homophobic followers, asking them to block her and stop sharing their hateful comments.