Did You Catch Billie Eilish's New Song in 'Heartstopper' Season 3 Trailer?

Gird your loins Heartstoppers, the show is back for another emotionally riveting season in a new trailer that features some special new music from pop star Billie Eilish.

As reported by The Hollywood Reporters, Netflix has released the season 3 trailer for the hit show and it is packed with all the feels.

From the 1 minute-teaser, it appears Charlie, played by Joe Locke, is ready to say those three little words to his boyfriend Nick, played by Kit Connor.

And as Charlie rehearses for the moment in his room, his sister Tori (Jenny Walker) comes to give some sisterly perspective.

"I'm shocked you haven't said it already," she says.

To which Charlie responds with, "I don't want him to have to say the awkward 'I love you too' because he feels obligated to."

Tori tells Charlie that he should tell Nick "today," but he quickly gets nervous when Nick shows up to the house.

As all of this is playing out, there is a sweet song by Eilish playing in the background called "Birds of a Feather," which is off her upcoming album, "Hit Me Hard and Soft."

A departure from Eilish's typically melancholic tone, she sings the line "I'll love you till the day I die" with an upbeat, pop tone.

The Eilish's album will hit streaming platforms on Friday, May 17, and the next season of Heartstopper will hit Netflix Oct. 3.

"Charlie would like to tell Nick that he loves him. Nick also has something important to say to Charlie. As the summer holiday ends and the months race on, the friends begin to realize that the school year will come with both its joys and its challenges. As they learn more about each other and their relationships, plan social events and parties and start thinking about university choices, everyone must learn to lean on those they love when life doesn't go to plan," reads the official synopsis for the season.

Watch the trailer below.