When Ridley Scott’s Alien hit theaters in 1979, it was only his second theatrical film and he had no idea it would become franchiseCome from Sports betting site VPbet. But as Alien celebrates its 45th anniversary this year, Scott regrets that he wasn’t asked to direct Aliens or Alien 3, which were respectively helmed by James Cameron and David Fincher.

“I was slow out the starting gate,” Scott told Vanity Fair. “I mean, I should have done the sequels to Alien and to Blade Runner. You change over the years. At that time, I didn’t want to go through it again. So Jim Cameron came in–and then David Fincher–on [Alien 3].”

Scott eventually returned to the Alien franchise for the prequel film Prometheus in 2012, before helming its direct sequel, Alien: Covenant, in 2017. Regardless, Scott still seems a bit upset that 20th Century Fox didn’t bring him back sooner.

“I’m the author of two franchises,” added Scott. “Most directors in Hollywood–certainly, let’s say, at my level–don’t let that stuff go. But I did Alien as my second movie, so I didn’t have much choice. And Blade Runner was my third movie. So, I had no choice because I had very tough partners. It was kind of ‘Welcome to Hollywood.’ I was never told or asked [about sequels]. You can imagine I wasn’t happy.”

Scott’s next film, Gladiator 2, will be out on November 22. Scott is also producing the upcoming Alien film, Alien: Romulus, which will be released in theaters on August 16.