If anyone knows about an underdog from Philadelphia finding that storybook ending, it's Sylvester Stallone.

The man who personified the Philly attitude as Rocky Balboa posted a message to Eagles fans on his social media.

Sly is wearing a custom "Stallone" Eagles jersey in the video and tells viewers he's a diehard Birds fan. He shouts out the great Timmy Brown as his favorite player as a kid.

"I got the ring, I got the jersey, I got the will, I've got the optimism that the Birds are going to fly triumphant over Philly tonight!" Stallone says.

"Keep punching, Philly."

https://www.instagram.com/p/BeOvfeLjcyt/?taken-by=officialslystallone

​The original Rock also shared an image of the Rocky Statue near the Art Museum decked out in Eagles gear.

"Now here is a statue that REALLY knows how to dress like a WINNER!!!!! I have tremendous respect for Tom Brady and the Patriots, but “… It’s about how much you can TAKE and keep moving forward! That’s how WINNIN’ is done!!!!” EAGLES BY KNOCKOUT!!!," the caption says.