The actress plays Barton's character, Marissa Cooper, in the unauthorized stage adaptation

Credit: Paul Archuleta/FilmMagic

California, here we come.

With a little more than a week ’til its premiere, The Unauthorized O.C. Musical is bringing the story of Ryan Atwood and his introduction to Orange County to the stage. And while the show will focus on the series’ pilot, expect a few of the show’s later moments to pop up, too – along with that iconic theme song, “California.”

“So we’re telling the story of the pilot, and that’s what we were doing originally, and that’s when we realized that there were so many more important moments of the series in general, different episodes in different seasons that we had to put those in,” star Molly McCook told EW at Amazon Studios’ Hollywood premiere of Hand of God on Wednesday. “So, we are doing little pop-out moments when we do those big, important moments. And I feel like the audience is going to go crazy and scream and cry. Also, we’re doing the theme song and all the big songs. It’s going to be a lot of fun, we’re very excited about it.”

McCook recently appeared in Cruel Intentions: The Musical from the creators of The Unauthorized O.C. Musical, playing the role of Reese Witherspoon’s character, Annette Hargrove. The original Cruel Intentions crew – Witherspoon, Selma Blair, and Sarah Michelle Gellar – staged a mini reunion during one of the performances, and Witherspoon even joined in for a few lines.

“Reese said a couple of lines with me, which was absolutely insane,” McCook said. “I had to pause because everybody else was applauding her for remembering all of her dialogue.”

With the premiere just around the corner, which members of the original O.C. cast would McCook flip out if she spotted them from the stage?

“Probably Mischa Barton because I’m playing her part, so I would freak out,” McCook told EW. “This is such a big space that I’m like so grateful for that because they’re all going to be in the dark, and I’m not going to be able to see them. But probably if Peter Gallagher showed up I would freak out because everybody loves Sandy Cohen. He’s like the face of The O.C. for me, and he’s like everybody’s dad. I would probably cry and fall into his lap and ask him to give me a hug. Yeah, that would be nice.”

The Unauthorized O.C. Musical bows Aug. 30 at The Montalbán in Los Angeles. To find out everything we know so far, head here.

Reporting by Scott Huver.​

This post has been updated since its original publication to update the location of the performance.