What’s the biggest shock with this newest version of Shakespeare’s tragic young lovers?

It’s certainly not the reverse-named title, “Juliet & Romeo,” nor the loss of the Elizabethan iambic pentameter verse. Or even the soulful “American Idol”-style singing of Verona’s medieval teenagers.

It has to be seeing Rebel Wilson in a way no one’s ever seen before, much less imagined her.

Said Wilson, 45, rhetorically in a Zoom interview. “I know, it’s a surprise: I’m Lady Capulet,” Juliet’s ever so serious mother. “I feel like if I was a producer, I don’t know whether I’d cast me as Lady Capulet. But then the opportunity came along.

“I loved that it was a pop musical interpretation of ‘Romeo and Juliet,’ and then I thought, ‘This is a challenge’ and, well, hang on! Back in the very first few years of my career, when I was a stage actress, I played a whole range of different characters in Shakespeare, Christopher Marlowe plays and good God! I remember doing this Spanish play called ‘The House of Bernarda Alba,’ which, if you see my career now, you’d be like, ‘Why the hell would she be doing that!?’

“So, in a way, it was like coming back to my very early acting roots. I took it as like somebody at a drama school and realized I enjoyed that challenge. Because obviously it is so different to the commercial comedies I’m known for.”

It was Wilson’s brilliantly colored Renaissance costuming that nearly did her in. “When you’re playing a modern character, you’re not really wearing 10-pound objects on your head. Although it certainly helps your posture. But the costumes were quite restrictive.

“Often I couldn’t really move my hands. At one point in the masquerade ball I’m wearing this heavy gold crown object on my head. And I could feel it falling! But I couldn’t reach up to stop it — I just didn’t have that mobility in my arms because of the fabric and everything.

“So it fell and hit me on the nose. And my nose started bleeding — and all the next day, I had to ice my nose. It was just a freak accident. But it really did hurt.

“Weirdly, in my next movie ‘Bride Hard’ ” — out in June — “I actually got my nose cut right open in a fight scene. A gun accidentally got whacked across my face in the last night of shooting.

“That was quite serious because I was rushed to hospital. And it really was the same point right in the middle of my nose. I was rushed to the hospital in Savannah, Georgia, and then they had a plastic surgeon sew my nose together.”

“Juliet & Romeo” opens in theaters Friday