Smallville actor Michael Rosenbaum to appear in Guardians of the Galaxy Vol. 2 

actor Michael Rosenbaum will play a significant role in

(out May 5). Gunn also teased the characters played by both Rosenbaum and Sylvester Stallone. The director made the announcement during an appearance on

“We do have a couple of characters who are very important to the Marvel universe, who are going to make their debut in

, that people don’t know about,” said Gunn. “And Sylvester Stallone plays one of these characters… But I will say that my friend Michael Rosenbaum also has a pretty decent role in the movie as well and it sort of works in tandem with Sly’s character.”

Rosenbaum subsequently tweeted about Gunn’s announcement. “I kept yapper shut 4 a year but can finally say what James Gunn announced on Adam Carolla,” he wrote. “I’m in freaking

, a web series created by Gunn and his two brothers, Sean and Brian.

I kept yapper shut 4 a year but can finally say what @JamesGunn announced on @adamcarolla I'm in freaking @Guardians @TheSlyStallone @Marvel pic.twitter.com/rNMrBYQ8Zw

— Michael Rosenbaum (@mrosenbaum711) March 17, 2017

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