'Three Company's Joyce DeWitt and Priscilla Barnes Pose With John Ritter's Grown Son in Rare Reunion Appearance

Priscilla Barnes and Joyce De Witt

The cast of Three's Company enjoyed a little reunion this week while honoring their late co-star, John Ritter.

Actresses Joyce DeWitt and Priscilla Barnes attended a benefit for The John Ritter Foundation for Aortic Health on Thursday, May 9, posing for some photos with Ritter's grown son, Tyler, during the event.

DeWitt, 75, and Barnes, 69, were all smiles for the occasion, both cozying up to Tyler, 39, for a rare photo together. The pics were strikingly reminiscent of the actress' days on Three's Company, in which they played Janet Wood and Terri Alden, roommates to Ritter's character, Jack Tripper.

DeWitt and Ritter starred in all eight seasons of the show, while Barnes joined during Season 6 to replace Suzanne Somers' character Chrissy Snow.

Ritter tragically died at age 54 from an undetected aortic dissection in September 2003. He was rushed to the hospital in the middle of filming 8 Simple Rules.

In addition to Tyler, who was 18 at the time of his dad's death, Ritter was also a father to three other children. He and his first wife welcomed their first-born son, Jason Ritter, now 44, followed by a daughter, Carly Ritter, 42, and then Tyler.

Ritter also welcomed a son, Noah, 25, with his second wife, Amy Yasbeck, whom he was to married until his death. Yasbeck, 61, also attended the benefit on Thursday, when she snapped photos with Ritter's former cast mates.

Thursday's event, titled "An Evening From the Heart LA," was held at Sunset Room in Hollywood to support the foundation, which aims to "raise awareness of thoracic aortic aneurysm and dissection through research, education, and advocacy, per John Ritter Foundation's website.

Next: Suzanne Somers' Cause of Death: Inside the 'Three's Company' Star's Health Battle and Controversies