From @EW

I was rehearsing with Rob and we were sort of dancing around this room, trying to do this scene,”  Stewart tells EW. “I put on Iron & Wine’s ‘Flightless  Bird, American Mouth’ and I just became instantly emotional. Rob couldn’t handle it — it got weird! But I was like, ‘oooh, this is perfect.’”

Wish I could see this bit of rehearsal magic.