Nancy Sinatra paid tribute to American actor James Darren after he passed away at the age of 88.

The multi-hyphenate star, who is the eldest daughter of Frank Sinatra, took to X, formerly known as Twitter, to remember Darren as one of her “sweetest, best friends in the world.”

The actress shared a collection of photos from over the years as a tribute to the late actor, who was apparently the godfather of her daughter AJ Lambert.

She wrote in the heartwarming caption: “One of my dearest, closest friends in the world has passed away.”

“Godfather to my daughter, AJ. I wish him a swift and beautiful journey through the Universe and beyond.

“Godspeed, dear Jimmy. My heart is torn but full of love for Evy, Christian, Anthony and Jimmy Jr.”

Professionally, the late actor worked in the television industry throughout his career, appearing in programs such as Melrose Place, Fantasy Island, And TJ Whore in the 80s.

In addition, Darren also directed episodes for several shows, including Beverly Hills 90210 And Melrose Place.

His most recent appearance was in the 2017 series Happydirected by John Carroll Lynch.