Also on these boards
I think they're messing with Jai Courtney on the bus they all take together from their hotel to these outings. Don't take my word for it, but the only two people wearing white (that we've seen) are Jai and Christian, and the pants look like Jai's. (Don't take my word for it).
And Shailene isn't alone. Her vibe is so infectious that when she kicked up her platform Alexander McQueen heels, she got a well-suited Theo James to break character and get into the act.