A continuation/addition to that future Klaine headcanon:

So the accidental proposal happens because Kurt’s giving his Tony acceptance speech, and thanking everyone and he saves Blaine for last. And maybe he’s babbling a little because he just won a fucking Tony and he says something like, “and I’ve been carrying a ring around in my pocket for the past month waiting for the perfect moment and - oh my god I did not mean to say that on live TV!” And the camera pans to Blaine who just looks completely shocked (and Rachel is sitting next to him poking his arm excitedly) and he’s really visibly saying yes but Kurt can’t see him since he’s onstage and the music starts playing to shoo him off and then somehow they’re in the same place and Blaine says yes.