John was on The Late Show to promote his long-delayed horror film A Quiet Place Part II, in which he directed his wife, and the filmmaker couldn't stop singing her praises. 

"The truth is, I think she's the most talented actress we have," John adorably gushed. "I mean, she's just the most unbelievably talented person, but also, more than acting, she's just such an incredible person to have on set. The entire crew, everybody who's around, just loves it much more when she's on set."

Without divulging any spoilers, Stephen teased that a scene toward the end involving children was a clue to the host about how much affection John has for his own kids. Sure enough, the actor was quick to agree. 

"As psychotic as it seems when you look at the poster, these movies are a love letter to my kids," the proud papa shared. "They really are."