"We've talked about the cake for a long, long time," Schwartz told AOL TV. "'The OC' went to 93 or 92 episodes, so we were close but no cake. It's really a testament to Stephanie [Savage] and her leadership, guiding the show to 100 episodes. We birthed it, but Stephanie's really raised this child. I just send an alimony check."
But it wasn't all cake talk. The cast also teased the highly anticipated 100th episode, and all we can say is OMG! Orgies, dance sequences, a royal wedding and a potential runaway bride? This is one episode you can't miss. And from what we hear, the first 10 minutes see the entire cast doing something they've never done before.
What can it be? Let the gossip commence ...
1. You don't want to miss the first 10 minutes
"We just filmed the scene the other day," said executive producer Josh Safran. "It's crazy. I wrote it, and it's something I've wanted to do since Season 1. I'm very proud of that moment, and when you see it, you'll know why. It's something we've never done before. From Season 1, I said, 'I want to do this.' But it just wasn't the right time. I've been pushing it for five years, and it finally happened. I can't tell you what it is, but it's the best thing we've ever done. Everyone was so excited, and showed up to play in such a major way. They made it even more than my dreams."
2. There will be a surprising dancing sequence!
"We shot a big dance sequence the other day," Blake Lively teased. "And we were all dressed up as different people other than ourselves."
3. And an even more surprising twist ...
"It's going to be an orgy," teased executive producer Josh Schwartz. "It's all one big orgy, really."
4. Blair is having a royal wedding
"Blair's always wanted to be a princess," said executive producer Stephanie Savage. "It was definitely fortuitous that we had the British royal wedding and also Price Albert in Monaco get married this summer, so we had a lot of royal inspiration. But it's also something that the crew will tell you, they've been planning for a while. Since Season 1, the crew has been planning Blair's wedding, so they're very happy to be able to do this episode."
5. Blair's wedding dress is Vera Wang, not Eleanor Waldorf Designs
"Eleanor is a really absentee parent, so when she can have an influence over her daughter, she does," said Margaret Colin, who plays Blair's mother Eleanor. "I'm really surprised that Eleanor didn't get to design the wedding dress. I was shocked. It was Vera! Who's Vera?"
6. Director Mark Piznarski also directed the pilot episode
"There are few subtle things to look for in this 100th episode that may give homage to the pilot," director Mark Piznarski told AOL TV. "[The cast] have gotten so much more confident as time has gone by. Some of them hadn't done much work before 'Gossip Girl.' Certainly, Blake [Lively] had done a few projects, as had Leighton [Meester], but Ed [Westwick] and Chase [Crawford] were relatively new. They were those characters instantly, and they've just gotten better and better. I still refer to them as my kids. They've grown tremendously."
7. Georgina is crashing Blair's royal wedding, Princess Beatrice style!
"I think Georgina is trying to one-up everybody," admitted Michelle Trachtenberg, who's set to make her anticipated return during the episode. "The fascinator that she's wearing at the top of her head is definitely attention-getting -- and hard to wear. I couldn't bend down without tickling someone's nose."
8. Blair may -- or may not be -- a runaway bride
"She does run away," admitted Margaret Colin. "She runs a lot. She runs upstairs, downstairs, she gets in a cab ... She's busy." Colin also admitted that Blair will be making that walk down the aisle "a couple of times." Looks like Blair's going to be having a few wedding nightmares.
9. Clothing is optional?
"The show has always been fashionably iconic because clothing is optional," teased star Matthew Settle (a.k.a. Rufus Humphrey) about the 100th episode. "But if they're wearing clothing, it's always stylish."
10. Are Blair and Dan really soulmates? Leighton Meester says yes!
"Selfishly, I love working with Ed [Westwick], I love working with Penn [Badgley], and I love working with Hugo [Becker]," said Leighton Meester. "I think that the best thing about it is that you don't know. I think it's fun to guess, and it's fun to see how all of the different story lines play out because she's dating and engaged to a Prince. I mean, what could be better than that? But then you realize that the fairytale isn't 100 percent perfect. It's not real. Her and Chuck have had ups and downs, and I think that as much as everyone loves them together, having them have time apart has actually helped Blair grow, and it's weirdly helped me grow too. The one relationship that I would love to see play out is Blair and Dan ... So, we'll see."
So will Blair make it down the aisle? The 100th episode of 'Gossip Girl' airs Mon., Jan. 30 at 8PM on the CW.