Lady GaGa joined the cast of American Horror Story: Hotel’ on Saturday (October 2nd) for the series' premiere at the Regal Theatre in Los Angeles. Gaga makes her small screen acting debut in the FX horror series’, playing the mysterious Countess Elizabeth who is set to make a big splash this season.

Lady GagaLady Gaga at the premiere of ‘American Horror Story: Hotel’.

Dressed in a stunning, low cut, scarlet gown, Gaga was accompanied by her fiancé Taylor Kinney and the couple weren’t afraid to show some affection on the red carpet. The singer wore her blonde hair in long, loose curls, while sporting red lipstick to match her striking gown.

On twitter Gaga expressed her excitement ahead of the premiere, tweeting: ‘Can't believe I'm about to go to my 1st premiere as an actress! I couldn't be more honoured to be a part of this talented magical cast.’

More: Billboard Names Lady Gaga Its 'Woman Of The Year’

The full ensemble cast of the drama was also on hand for the season premiere, including Sarah Paulson, Kathy Bates, Matt Bomer and Angela Bassett, as well as supermodel Naomi Campbell who will appear in a supporting role as Claudia.

While little is still known about Gaga’s character, show creator Ryan Murphy did spill a few secrets to Billboard about what fans can expect from The Countess Elizabeth. "She is a very wealthy social doyenne who is consumed with art, fashion and people and she has a nefarious plan that is revealed in the first episode that plays out over the season," Murphy said. 

More: ‘American Horror Story: Hotel’ Stars Dish The Dirt On Lady Gaga’s Themed Pool Party

The showrunner also revealed to E! last week what it was like working with Mother Monster. “I've met and worked with a lot of great people, legends, on and on and on. She was somebody I was very intimidated by and I thought, 'Oh, Lady Gaga. The mystery, the mystique.' I really thought there was a [Greta] Garbo element to her of elusiveness and mystery,” Murphy said.

“What I have found is she is just the best, most fun, most joyful person. Like, you would be stunned. She is so funny and she is down to Earth, and she comes into the set and the crew adores her. The other actors love her. She's funny and she's super professional. If she has a scene to shoot, she's up at the crack of dawn not just working on the look of it, but the acting of it…She’s a true star,” Murphy gushed. ‘American Horror Story: Hotel’, premieres October 7th on FX.