Evan Peters has revealed his initial reaction when he found out that Lady Gaga is joining the upcoming season 5 of the FX horror anthology series Hotel.

"First of all, I didn't know the name of the show and second of all, I didn't know that Lady Gaga was going to be on it," Peters told Cosmopolitan during an interview promoting his new drama film "Safelight. So when I saw the video announcement of her casting on Twitter I was like, 'This is badass.'" 

Peters, who will play Dr. March in the new installment, has never worked with Lady Gaga before, so he couldn't wait to finally meet her on the set. "I'm so excited to work with her and to see her on the show," the 28-year-old actor told the outlet.

Asked how he's going to call the Mother Monster -- Stefani Joanne Angelina Germanotta  in real life -- the actor said that he will call her Lady Gaga, Ms. Gaga or Stefanie "depending on the situation." But actually, I want to call her Stefanie," Peters continued. "I think it would be really cool to call Lady Gaga by her first name. Or Gags.​"

Apparently, Peters isn't the only returning "American Horror Story" actor who's excited to work with the 29-year-old "Born This Way" hitmaker. Sarah Paulson, Matt Bomer, Katy Bates and others expressed their excitement for the opportunity to bond with Gaga. Are you excited to see Peters share scenes with Gaga? Let us know how pumped are you in the comments section below!.