"Stargate SG-1" and "The Godfather Part II" star Carmen Argenziano has died, aged 75.

The veteran actor passed away on Sunday, Event Horizon Talent — his personal appearance agency — has revealed.

In a moving tribute posted on Facebook, Event Horizon Talent said: "It is with a heavy heart and more sadness than anyone can realize right now that I announce the passing of client Carmen Argenziano at the age of 75.

"His acting career began in the early 1970s and included a turn in The Godfather, Part II. "Carmen worked steadily over more than 40 years and was a staple character actor on our televisions throughout that time, including on series such as 'Cheers,' 'Melrose Place,' 'ER,' 'CSI:NY' and many others, while also lending his talents to films both tentpole [expensive major motion picture] and intimate."

The agency added that, "to genre fans, he is best known for his role as Jacob Carter/Selmak on the series 'Stargate SG-1', a role he relished and recurred in for seven years.

"While Carmen was a client, he was also a good friend.

"While he was a class act and a consummate gentleman at the events he was booked for, he was also a caring and generous person.

"While I had known him for more than a decade, it wasn't until the past three years as a representative for him that our trust and friendship grew and blossomed.

"He truly treated me like family, and that sentiment was returned.

"Please join me in sending thoughts and prayers to Carmen's family and loved ones during this difficult time.

"Godspeed, my friend."

The Pennsylvania-born actor starred in many television episodes over a period of 50 years, including popular shows such as "Columbo."

The star has 227 acting credits to his name on IMDb.

He played General Jacob Carter in 25 episodes of "Stargate SG-1," from 1998 to 2005, and was considered one of the show's best-loved stars.

Argenziano is survived by his wife, Lisa, and his three children.

Fans have been paying tribute to the actor, posting on Facebook that he was "such a nice guy."

One woman, who met him in Chicago at a "Stargate" convention, recalled having a "heart-to-heart" with him, and she found him "sweet, kind and non judgmental.

"It's amazing how a person can have an effect on your whole life with a simple chat. He truly was very gifted."

John Osterbeck posted: "Oh no! I worked with Carmen Argenziano on 'Stargate.' He was so kind and sweet, funny and respectful."

This article originally appeared on The Sun.