Watch Sylvester Stallone's Birthday Tribute To 'Fantastic Enemy' Arnold Schwarzenegger

He couldn't resist having a sly dig

Sylvester Stallone took to Instagram to share a snippet of his birthday speech to Arnold "big man" Schwarzenegger.

Sly picked up the mic at Arnie's 70th yesterday (30 July) and praised him for having "boundless energy".

He said: "You don't quit, you don't quit, and you still don't quit. It's boundless energy."

Of course before they hugged it out, Sly couldn't resist having a little dig, as he joked how he'd been a "fantastic enemy" over the years.

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"But, you've been a fantastic enemy and a better friend. That's all I can say bro. Congratulations."

Schwarzenegger has previously joked how their relationship started off more Frazier/Ali, but they soon became friends after co-staring in Escape Plan and The Expendables.

And it's not the first time the time the pair have taken to social media to show off their bromance either, as Schwarzenegger posted the video below for Stallone after his first Golden Globe win last year.