Arnold Schwarzenegger says he and Sylvester Stallone are 'inseparable' despite once trying to 'derail' each other's careers

• Arnold Schwarzenegger spoke about his rivalry with Sylvester Stallone on "The Graham Norton Show."

• The actor recalled how the competitiveness with him and Stallone got "out of control."

• Those days are gone, however, as Schwarzenegger revealed the pair are now "fantastic friends."

Arnold Schwarzenegger said although they once "tried to derail" each other's careers, he and Sylvester Stallone are now "inseparable."

Schwarzenegger appeared on "The Graham Norton Show" in the UK Friday to promote his new book, "Be Useful: Seven Tools For Life," and his impressive career, when he touched on his longstanding feud with the "Rocky" star.

While the two Hollywood legends are now good friends, having starred in "The Expendables" and "Escape Plan" together, that wasn't always the case.

For the last quarter of the 20th century, the pair battled it out at the box office as they repeatedly tried to outdo each other with elaborate action movie storylines and stunts.

Schwarzenegger said: "We were movie rivals, but we took the competitiveness to the extreme — we each had to have the best body, we had to kill more people in our films, and we had to have the biggest guns."

"It got out of control, and we tried to derail each other," he added.

He then revealed how the two eventually became "fantastic friends."

"When we both invested in Planet Hollywood, we started flying around the world together to promote it," Schwarzenegger said. "He is a great human being, and we are now inseparable."

In Schwarzenegger's Netflix docuseries "Arnold," which premiered in June, Stallone conceded that the "Terminator" star was a "superior" action hero.

"He just had all the answers. He had the body. He had the strength. That was his character," Stallone — whose own Netflix documentary "Sly" comes out in November — said in an interview. "He wanted to be number one. Unfortunately, he got there."

For his part, Schwarzenegger credited his competition with Stallone for helping push him further in his career.

"Without Stallone, I maybe wouldn't have been as motivated during the '80s to do the kind of movies I did and work as hard as I did," the actor said.

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