Since starring in Nickelodeon's hit show "Big Time Rush," Kendall Schmidt has been busy in the studio recording, mixing and working with his current band, Heffron Drive.

He recently casually dropped a mysterious tweet this weekend about another project that involves producing a new song by a member of One Direction, like NBD.

Who? What? When? Hmm...so vague, Kendall!

Big Time Rush and One Direction's boy band-bromance started in 2012, when 1D joined BTR's Better With U Tour -- a concert I did not get to attend and still have immense FOMO about, tbh.

BTR and 1D first met in Los Angeles before their tour, and it went down like this:

Carlos Pena checked in with 1D during the tour, and they played Fruit Ninja IRL:

1D said BTR is "really nice" and sang their fave song in an interview:

"We're going to go hang out with them in a minute, actually," Harry told the reporter.

Niall invited Kendall to come to the "This Is Us" movie premiere:

And they were basically BFFs:

Chances of Kendall and Niall collaborating are pretty likely, but no matter who he works with, the song will definitely be amaze.

Now we will all stay pressed to Kendall's Twitter waiting for more info.