Margot Robbie is indeed a Potterhead.

The 26-year-old actress, best known for her role as Harley Quinn in “Suicide Squad,” watched a performance of “Harry Potter and the Cursed Child” at the Palace Theatre in London, England over the weekend.

Robbie was joined by her fellow DC Extended Universe actor Ben Affleck, who took his 10-year-old daughter, Violet, with him. “Glee” alum Darren Criss was also there to see the show.

Robbie, Affleck and Criss all went backstage after the show where they posed with the production’s cast and crew for a couple of photos, which were shared on the official Twitter account of “Harry Potter And The Cursed Child.”

“Harry Potter and the Cursed Child” is a two-part West End stage play written by Jack Thorne based on an original new story by Thorne, J.K. Rowling and John Tiffany. The story is set 19 years after the events of “Harry Potter and the Deathly Hallows” and follows the life of Harry Potter, now an employee of the Ministry of Magic, and his son Albus Severus Potter. The rehearsal script was released in July and became the eighth story set in the “Harry Potter” universe.

Robbie most recently talked about her love for the “Harry Potter” franchise during an interview with Harper’s Bazaar earlier this month.

“I'm a massive ‘Harry Potter’ nerd, and although I've read the books probably 20 times each, I read ‘Harry Potter’ before bed and it helps me switch my brain off," she told the fashion magazine.

In addition, during Robbie’s appearance on “Jimmy Kimmel Live!” last June, Kimmel showed a photo of the actress from her teen years that proved her love for the Wizarding World.

“Literally the most embarrassing photo of my entire life,” Robbie said with a laugh when a photo her reading a “Harry Potter” book popped up on the screen. 

“I'm drinking a cup of tea. I'm in bed. I'm clearly really enjoying myself, reading ‘Harry Potter,’” she explained of the pic, which was taken on her 13th birthday. "I have braces, which I had for two years. I was really into slicking my hair back — God knows why — and I'm wearing glasses, which I didn't actually need. I have 20/20 vision and I lied to get glasses so I could look like Harry Potter. They're not even cool ones. They're, like, ugly glasses.”