Millie Bobby Brown said that her friendship with Enola Holmes 2 co-star Henry Cavill has “terms and conditions,” while her friendships with Stranger Things cast members have “no boundaries.”

Millie Bobby Brown and Henry Cavill’s friendship has “healthy” boundaries.

The 18-year-old actress told Deadline about working with the 39-year-old Superman actor on the Enola Holmes films, in which she plays the titular younger sister to his famed detective Sherlock. Brown claims her friendship with him is more “adult” than her friendships with Stranger Things co-stars Noah Schnapp and Charlie Heaton.

“Because I grew up with Noah and Charlie, it’s dissimilar.” I first met them when I was ten years old. “So it does feel like your classmates to me,” she stated. “And it feels like a real adult relationship with Henry.” like a really good, really healthy friendship. “We have terms and conditions for one.”

“I’m familiar with Henry. He has agreed to terms with me. “I’m not permitted to inquire about his personal life,” Brown continued. “Millie, shut up,” it says. No.’ And I say, “Understood.” It’s not the same for the Stranger Things kids. “There are no borders because we’re all siblings.”

“But with Henry, he’s very strict with me, which I appreciate,” she added.

The director of Enola Holmes 2, Harry Bradbeer, talked to Deadline about how he watched Cavill and Brown develop a sibling relationship for the movie series.

“In some ways, Henry, like Sherlock, is very rational, but he is also learning to have fun and be spontaneous.” And, of course, Millie and he had this fascinating, enjoyable dynamic in which they were constantly poking fun at each other, as  BradBeer stated. “And Millie delights in tickling him and surprising him, and he goes along with it.”

Brown stated, “He is correct.” It’s surprising because he has no sisters. So it must be totally different for him. I grew up with a sister, a brother, and an older brother, so I’m used to that kind of dynamic. I had to incorporate a lot of that into my off-screen and on-screen relationship with Henry in order to push him out of his comfort zone.

“Henry and I both don’t have little sisters and would’ve liked to have little sisters,” Bradbeer added, “which helps explain our enjoyment of working with people like Millie.”

Enola Holmes 2 is now available on Netflix.