By Maureen Lee Lenker
Updated July 30, 2017 at 03:50 PM EDT
Todd Williamson/Getty Images

Arnold Schwarzenegger and Sylvester Stallone don’t just have each other’s backs on screen.

Stallone wished his friend and costar an early “happy birthday” Friday on social media while sharing some throwback photos, and he followed up with a proper speech to “the Big Man” as Schwarzenegger celebrated 70 years Sunday.

The Rocky star first shared side-by-side images of a young body-building Schwarzenegger in workout gear and Stallone in his Rambo costume in what appears to be his famous 1982 film First Blood. Stallone wrote, “Pre – HAPPY BIRTHDAY ARNOLD!!!! As long as you live and beyond, you’re always going to be the ‘BIG MAN’ Who set the bar so high that it will never be surpassed, an action hero legend!”

Later, in a speech excerpted on Instagram, Stallone lauded Schwarzenegger’s “boundless energy” and added, “You’ve been a fantastic enemy and a better friend. That’s all I can say, bro.”

The two were last seen on screen together in 2014’s The Expendables 3; Stallone has since parted ways with the aging action hero franchise.