Who needs Tom Cruise when you have a hot co-star like Luke Kirby!
The pretty pretend couple was seen shooting even MORE scenes laughing, smiling, and holding hands in NYC this week.
But since the love story is about two manic depressives, we're betting the playful lightness of their onscreen relationship will be taking a dark turn soon enough.
Thankfully, the drama won't be real because we would NOT be upset if this twosome was added to the looonnnnggg list of co-stars turned real-life lovers!!!!!
WE APPROVE, Katie. We approve.
[Image via Splash News.]