The 39-year-old actor and 29-year-old author were spotted out to dinner on Thursday evening (January 17) at Smoke House Restaurant in Burbank, Calif.
The group looked tight-knit as they said their goodbyes outside of the restaurant.
A source recently explained that Jack has been a large part of the recently engaged couple’s relationship since the very beginning.
“Instead of mostly enjoying solo, romantic dates, Chris’ son from early on was a very big part of their dating life,” the source told People.
They added, “Katherine never minded that her dates with Chris many times involved a kid activity, like a matinee movie, or going to Disneyland. Katherine is like a big kid and loves doing activities with Jack. She loves that Chris is a dad.”