First 'This Is Us' Season 4 Trailer Introduces Cast Of New Characters

In honor of the Big Three's birthday (August 31), NBC gifted us all with the first trailer for the upcoming fourth season of This Is Us — and we were not expecting the twist!

The clip introduces us to a whole slew of new characters. Though the details are hush-hush for now, the new cast members include Asante Blackk, Marsha Stephanie Blake, Omar Epps, Bahara Golestani, Jennifer Morrison, Timothy Omundson, M. Night Shyamalan (yes, the heralded director), Julian Silva, Auden Thornton and Nick Wechsler.

"It's so strange, isn't it? How just like that a complete stranger can become such a big part of your story," Rebecca Pearson (Mandy Moore) says to Jack (Milo Ventimiglia) in the trailer. "It's actually kind of terrifying, you know? How a single cross with one person you've never met can change everything."

Ventimiglia sure wasn't kidding when he said "the world expands" during a recent visit to Watch What Happens Live With Andy Cohen!

Watch the This Is Us Season 4 trailer below.

In addition to the new faces, main cast members Moore, Ventimiglia, Sterling K. Brown, Justin Hartley, Chrissy Metz, Susan Kelechi Watson and Chris Sullivan are all set to return, as well as familiar faces including Griffin Dunne, Tim Jo, Ron Cephas Jones, Elizabeth Perkins, Phylicia Rashad and Caitlin Thompson.

This Is Us returns September 24 on NBC.

Photo: Getty Images