FX has finally released the first full trailer for "American Horror Story: Hotel." The sneak peak, called "Hallways," gives fans of the anthology series the first look at the cast of the mysterious fifth season, including Lady Gaga, Sarah Paulson, Matt Bomer and Evan Peters!

The 30-second trailer starts off with a little kid running down a hallway of the Cortez hotel. The first characters shown are West Bently and Chloe Sevigny's married couple. Bently plays LAPD detective John Lowe, who checks into the hotel to investigate a series of murders perpetrated by the Ten Commandments Killer, according to Entertainment Weekly. Sevigny plays the role of his wife, Alex, a pediatrician.

As the child runs down the hallway of the hotel, a blender full of blood appears, and a doorway is blocked by someone sewn into a mattress. Once the mattress is knocked down, Sarah Paulson's hypodermic Sally appears to cut the poor soul in the mattress out as Kathy Bates' character Iris creepily walks by.

Viewers are then taken down a red hallway where Danis O'Hare's character, a cross-dressing bar tender named Liz Taylor, is shown pushing a hotel cart as Angela Bassett's character Ramona Royale is leading a man down the hallway with a leash. The red hallway opens up into a great white room where more creepy children jump on couches. In the middle of the room a chair turns around to reveal Matt Bomer's Donovan, the love interest to Lady Gaga's the Countess.

Finally, the camera zooms to the lobby of the hotel, where Cheyenne Jackson's Will Drake and Finn Wittrock's Tristan walk away from someone in a wedding dress with a long train. As the woman in the dress enters a hotel elevator, she turns around and reveals her face to be that of Lady Gaga before the screen quickly reveals the "American Horror Story: Hotel" title card.

Fans also quickly get their first glimpse at Evan Peters as Mr. James March, the mad-man who founded the Hotel Cortez in the 1930s.

This season of "American Horror Story" premieres Wednesday, Oct. 7 at 10:00 PM ET/PT.

Check out the trailer below!