"Ran into Dolph Lundgren at lunch," Stallone, 69, captioned a photo of the pair on Instagram.
"And no, we did not fight over the check or have a rematch."
In the snap, both actors look happy to see each other as the smile and pose for the pic.
Stallone starred alongside Lundgren, 58, in 1985's "Rocky IV" and again in 1990 for "Rocky 5".
The 69-year-old actor has used Instagram in the past as a way to showcase other "Rocky!" moments.
In February, the "Creed" star shared multiple vintage photos from the original film.