Jamie McCarthy/Getty Images
Stephen Colbert interviewing George Lucas during a panel at the Tribeca Film Festival Friday afternoon.
In its limited release May 25, 1977, "Star Wars: Episode IV - A New Hope" made $1.5 million in theaters, a number that was unheard of at the time.
The film went on to make more than $775 million worldwide.
Perhaps no one was more stunned by the film's success than creator George Lucas himself.
During a Tribeca Film Festival panel Friday hosted by Stephen Colbert, Lucas recalled how no one thought the movie was going to be a hit - not himself, not 20th Century Fox, and not even his closest friends.
"I didn't think the film was going to be successful," Lucas said.
Colbert didn't accept that.
"You must have thought at a certain point," Colbert insisted. "At what point did you say to yourself, 'I really got something here'?"
Lucas immediately responded, "No."
"I showed it to all of my friends early on, but it was mostly [filled with] stock footage of old war movies, and all kinds of stuff," he said. "They saw it and [said] 'Poor George.' 'What were you thinking?'"
According to Lucas, the only one who said "Star Wars" was going to be a hit was his close friend Steven Spielberg.
AP/Wally Fong
Steven Spielberg and George Lucas in 1984.
Lucas said his filmmaker friends helped him fix up "Star Wars" even though "they didn't have any faith in it."
They weren't the only ones.
"The studio, the board [at Fox] didn't have any faith in it," he continued. "Even when we showed it at [an] 'American Graffiti' screening and everybody loved it."
When "Star Wars" was preparing to debut May 1977, Lucas was prepping to head to Hawaii.
Lucas explained that's just what he does when his films are coming out at theaters.
"I don't read the reviews," he said. "I just go, lay on a beach. Steven [Spielberg] was there."
Before he was able to leave, Lucas said he received a call from Alan Ladd Jr., the then president of 20th Century Fox who was one of the few believers in the film. Ladd, who Lucas refers to as Laddie, was telling him, "It's a fantastic hit! Every single paper! There are lines around the block. You can't believe this!"
AP Here's the original caption that went with this AP photo from 1977: "Theater goers waiting in lines here on June 7, 1977 at Avco Center Theater in Los Angeles to see the smash-hit movie, "Star Wars," which has seats sold out for every performance and has grossed $5.2 million since it opened 12 days ago. The special effects that are fantastic and appealing."
"Laddie, calm down," said Lucas. "It's a science fiction film. Science fiction films get a good old group of sci-fi fans. They'll go to anything the first week. Wait for a couple weeks, and you'll see what it's really gonna do."
For Lucas, it sounded a bit frustrating.
"[Originally] Nobody liked it [at the studio]. It hadn't been shown to the real audience," he explained to Colbert. "And then they called and said, 'Oh, it's a big hit.' I said, 'Well, look, let's not get too excited here.'"
What finally convinced Lucas "Star Wars" was a phenomenon? A phone call while he was off vacationing in Hawaii.
"I got a call from Laddie after the first weekend. It was really like in the middle of the week," recalled Lucas. "He called and said, 'George, turn on the news.' I said, 'What?' He said, 'Turn on CBS. Turn on the news. Walter Cronkite.' You gotta see it.'"
"So I said, 'What is it now?' I turned on the news, and they had this huge story on the sensation of 'Star Wars,' and lines around the block. Everybody was going berserk about it," said Lucas. "That was the first time I understood that it was a big hit."
The six films in the "Star Wars" franchise have gone on to make over $4.3 billion combined worldwide, according to figures from BoxOfficeMojo.
The entire franchise is estimated to be worth more than $30 billion.
The seventh film in the saga, "The Force Awakens," which Lucas won't have a hand in, will be released in theaters December 18, 2015.