As production begins on the highly-anticipated sequel to last year's beloved Netflix rom-com "To All the Boys I've Loved Before," the film is continuing to expand its cast. And the newest hire is adding a dash of bromance to the romance.

Netflix revealed on Monday that -- no foolin' -- actor Ross Butler ("13 Reasons Why," "Riverdale") will be joining the flick, playing Trevor Pike, the best friend of Noah Centineo's main love interest character, Peter Kavinsky. Butler and Centineo are good pals off screen, too, and that was part of the appeal in casting Butler, according to filmmakers.

“His real-life friendship with Noah brings a natural chemistry and great rapport to the set and we can’t wait for fans to see this friendship play out onscreen," said producer Matt  Kaplan, in an interview with Entertainment Weekly.

Centineo and Butler showed off their excitement over Butler's casting by doing some spontaneous silly dancing behind the scenes on set. Star Lana Condor (who plays the film's protagonist, Lara Jean Covey) isn't entirely impressed, though.

Lara Jean already has plenty on her mind in "To All the Boys 2," since John Ambrose (the recently-cast Jordan Fisher) is now on the scene to stir things up. We can't wait to see how this budding love triangle shapes up.

No release date has been announced yet. Stay tuned.

[via: Netflix/Twitter, Ross Butler/Twitter, Entertainment Weekly]