Catherine let her husband and his father share this sweet onstage moment while she watched proudly from backstage.
The pair was snapped enjoying a fun day out at the ballpark together.
One of many photos of the trio in their element at an event celebrating their amazing film careers.
Sometimes all you need is a day out on the green with your family. The group smiled for photos in between their fun game of golf.
Michael shared this sweet photo of four generations of Douglas'. Clearly, the esteemed Hollywood actor has left a mark that will continue for years to come.
Catherine was very close to her husband's father and on many occasions talked about the pairs strong bond. She's affectionately referred to him as "Pappy" many times.
The pair stopped to smile for the cameras on the red carpet. One of many moments when they were snapped walking at a Hollywood event together.
Michael and Catherine were snapped sharing a sweet kiss for the beloved patriarch of the Douglas family.
A still from their popular 2003 film It Runs in the Family where they played a father and son duo. Art imitating life!
Catherine posted this picture of her father-in-law for his 103rd birthday. "This guy on my knee, is 103!!!!!" She shared. "Happy Birthday Pappy!!! I love you with all my heart."