EXCLUSIVE: The Cast of 'Scandal' Can't Stop Fangirling Over Guest Star Lena Dunham!

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It's Girls meets Gladiators!

Lena Dunham is guest-starring tonight's all-new episode of Scandal, and aside from her questionable wig, we're excited to see what the HBO star will bring to our favorite TGIT drama.

To get the inside scoop on Dunham's secretive debut on the Shonda Rhimes series, we caught up with the Golden Globe winner and the stars of Scandal and we found out who's the biggest Girls fan on set. (Spoiler Alert: It's hard to tell because the entire cast was wilding fangirling and fanboying over Dunham's appearance!)

"Shonda is a very skilled writer and wrote me a really fun party to play," Dunham dished to ETonline at the Girls PaleyFest red carpet. "Unfortunately, besides the images that you've already seen, B6-13 will take me out of I say anything."

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It's no secret that Dunham is a huge Scandal fan. In fact, when the 28-year-old actress hosted Saturday Night Live last March, she and the cast created a side-splitting Scandal parody with Dunham playing a recent college grad-turned-Gladiator.

But when asked if her Scandal character is anything like the giggly SNL intern, Dunham was quick to reply: "That's amazing, but no," she said with a laugh.

In the episode, Dunham plays Kinky Sue, a woman who writes a juicy, salacious tell-all about the politicians she’s had sex with -- including ambassadors and senators. "She has a fabulous character," Tony Goldwyn confessed. "She's going to be brilliant."

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"[Her character] is really sassy and it's very different then we've seen Lena do on television or movies," star Guillermo Diaz spilled. "It was great, you know, Lena is a big fan of Scandal, and I'm a huge fan of Girls and so is some of the cast -- Oh my God I'm a diehard fans of Girls."

Star Bellamy Young even brought in her copy of "Not That Kind of Girl" -- Dunham's best-selling book -- for the star to sign. "I was a total fangirl I just couldn’t believe it," the on-screen FLOTUS gushed. "Shonda announced [Dunham would be guest-starring] right after we read the episode and we all went crazy!"

For more news on Dunham's highly anticipated guest-role, take a look at our exclusive interviews with the Scandal cast in the video above!

Scandal airs Thursdays at 9 p.m. on ABC.

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