Dylan O'Brien And Lamorne Morris Completely Transform In The First Trailer For The Upcoming Movie About The Early Days Of "SNL"

The latest film from director Jason Reitman (Ghostbusters: Afterlife, Juno) is set in the early days of Saturday Night Live, and the trailer just dropped today.

Jason Reitman smiling at a public event, wearing a dark sweater over a white collared shirt
Steve Granitz / FilmMagic / Getty Images

The film is aptly titled Saturday Night. It chronicles series creator and executive producer Lorne Michaels as he assembles and (attempts to) corral a rag-tag crew of young comedians starring on a live late-night NBC sketch comedy show. The Fablemans' star Gabriel LaBelle plays Michaels.

A hotel employee speaks to a man in uniform and shows an ID card; another man stands in the background wearing a checkered blazer
Sony Pictures Entertainment / Via youtube.com

So many recognizable actors appear in the film, which is set in 1975. They're mostly playing SNL's original cast members, the team behind the show, or their spouses or partners: Dylan O'Brien, May December's Cory Michael Smith, Dickinson's Ella Hunt, Lamorne Morris, Rachel Sennott, Cooper Hoffman, Kaia Gerber, Nicholas Braun, Willem Dafoe, No Hard Feelings' Andrew Barth Feldman, Finn Wolfhard, Jon Batiste, J.K. Simmons...the list goes on.

You can check out the cast and who they're playing here.

Many are nearly unrecognizable in costume, including O'Brien as cast member Dan Aykroyd.

A bearded man, Dylan O'Brien, wearing a white shirt layered under a navy sweater and a beige coat, posing for a photo against a plain background
A bearded man, Dylan O'Brien, wearing a white shirt layered under a navy sweater and a beige coat, posing for a photo against a plain background
A man in a red tank top and jeans stands amid a group of people, including one wearing a yellow hard hat. The surrounding crowd watches attentively
A man in a red tank top and jeans stands amid a group of people, including one wearing a yellow hard hat. The surrounding crowd watches attentively

Stephane Cardinale - Corbis/Corbis via Getty Images, Sony Pictures Entertainment / Via youtube.com

Same for Lamorne Morris as fellow cast member Garrett Morris...

Lamorne Morris on the red carpet wearing a mustard-yellow suit jacket, white shirt, and red pocket square
Lamorne Morris on the red carpet wearing a mustard-yellow suit jacket, white shirt, and red pocket square
Scene from a movie with a man in a suit smoking thoughtfully, background includes another man and people in casual attire
Scene from a movie with a man in a suit smoking thoughtfully, background includes another man and people in casual attire

Emma McIntyre / Getty Images, Sony Pictures Entertainment / Via youtube.com

...and Ella Hunt as the iconic Gilda Radner among others.

Ella Hunt in an elegant, sparkly, one-shoulder dress poses at a red carpet event. A blurred figure in a cowboy hat is in the background
Ella Hunt in an elegant, sparkly, one-shoulder dress poses at a red carpet event. A blurred figure in a cowboy hat is in the background
Ella Hunt as Gild Radner with curly, voluminous hair and glasses is looking forward, wearing a light sweater. The background is dimly lit
Ella Hunt as Gild Radner with curly, voluminous hair and glasses is looking forward, wearing a light sweater. The background is dimly lit

Steve Granitz / FilmMagic / Getty Images, Sony Pictures Entertainment / Via youtube.com

So watch the full trailer below:

Saturday Night will be released in theaters on Oct. 11.