New "Scandal" season 4 spoilers reveal that Lena Dunham, who is appearing in tonight's episode alongside Kerry Washington, had to learn some things quickly once she got on set of one of her favorite TV shows.

Guillermo Diaz, who plays Huck on "Scandal" season 4, revealed some juicy spoilers about Lena Dunham's adjustment from the "Girls" set to the filming of tonight's "Scandal" episode, in which she guest stars.

"She got used to speaking really fast, like we do on the show, very easily," Diaz told TVLine.com. "She's a huge fan of 'Scandal,' and we're all a big fan of 'Girls,' so it was exciting to have her on set."

Meanwhile, Diaz also revealed spoilers about Lena Dunham's mysterious role in tonight's "Scandal" season 4 episode.

"She's really sassy," is all he would say about Dunham's character.

Lena posted a photo of her on set with Kerry Washington, giving her character the nickname "Kinky Sue."

We can't wait to see her in action!

 Finally at liberty to reveal this pic of me on the #scandal set as "Kinky Sue" with my true [heart] @kerrywashington

A photo posted by Lena Dunham (@lenadunham) on Mar 5, 2015 at 11:47am PST

But how can we first not mention all the chatter going on about Dunham's distracting blonde wig, Dunham defended by saying it "looks better on screen than it does in photos."

But even "Scandal" creator Shonda Rhimes admitted the wig was "a crazy choice."

"But it's a choice, but it's there," she told Vulture. Rhimes also slipped that the wig was Lena's idea.

"Lena's fantastic. It's been really great having her, it's a really fun episode. It has a very surprising ending. It's a good time," she added.