Nick Jonas has been busy promoting his return to Broadway, and yesterday the 19-year-old called into On Air with Ryan Seacrest.

Nick talked about everything from his guest appearance on “Smash” to a Jonas Brothers reunion to the leak of “Dance Until Tomorrow.” Check out highlights below.

On his character in “Smash”: [He] helps fund this workshop for ‘Marilyn‘s’ [Monroe] life on Broadway. I have most of my scenes with Anjelica Huston which is was a mind-blowing experience.

PHOTOS: Nick Jonas’s Opening Night in How to Succeed

On a Jonas Brothers reunion: Here’s what I will say. Once I’m kind of up and running in the show and feeling comfortable I’d say that my brothers and I are definitely going to start writing again. It’s been a while. It’s going to have been three years at that point which is obviously the longest stretch we’ve ever gone without releasing [music]. But we’ll start writing, and get more into it and hopefully we have something out for our fans. If not later this year, maybe next year.

On the leak of “Dance Until Tomorrow”: It’s a song that we actually recorded probably two and a half years ago that we were thinking of maybe putting on our last album Lines, Vines, and Trying Times, and we ended up not [doing it]. But we still love the song, and actually had some other artists express interest in recording it, but somehow this song leaked, and the fans responded really positively to it which was great.

On Valentine’s Day plans: [I'm] interested to see what this [Broadway] schedule becomes as far as how tired I’ll be after these shows every night, because it is going to be pretty insane show as far as the dancing, singing, and acting goes. I think on Valentine’s Day I might make an exception and plan something. Stay up a little bit later than I usually would.

Listen to the full interview below. Are you excited for a JoBros reunion?