"Batman Begins" actor Katie Holmes has enjoyed a close relationship ... and "Mission Impossible" star Tom Cruise, who has two children from his previous marriage to Nicole Kidman.

The cozy selfie was uploaded to Holmes' Instagram on Thursday ... But can you guess who Katie's Our Town co-star is? It's Jim Parsons, who played Sheldon Cooper on CBS' The Big Bang Theory.

Katie Holmes has been taking fans along with her on her Broadway journey over the past few months, while playing Mrs Webb in Our Town. The Dawson's Creek star not only had a wonderful time ...