Sylvester Stallone Begins Filming 'This Is Us' - See the Photos!

Sylvester Stallone has officially begun filming his guest starring stint on This Is Us!

The 71-year-old actor took to Instagram on Saturday (August 12) to share tons of photos of himself with the cast of the hit NBC drama.

“My good buddy Milo Ventimiglia who nice enough to invite me to be on the show #thisisus,” Sylvester captioned one photo of himself with Milo Ventimiglia before posting more photos with the show’s stars Justin Hartley and Chrissy Metz.

At the 2017 Summer TCA Press Tour, the cast of This Is Us announced that Sylvester would be joining the show in a role that will impact Kevin (Justin) in his upcoming movie.

Season two of This Is Us premieres on Tuesday, September 26 on NBC.

See Sylvester and the cast in the photos below!