The actor also opened up about Brie Larson joining the team in 'Avengers: Endgame.'
Joining the Avengers was a familiar feeling for Paul Rudd.
ET's Kevin Frazier recently sat down with the 50-year-old actor at the Los Angeles press day for Avengers: Endgame, where he opened up about being part of another famous group of Friends. Rudd joined the sitcom as Mike Hannigan on season nine of the series, in 2002.
"It's the one experience I could say felt a little similar, where I kind of join this group... even though I used 'join' in quotes -- it was like, I get to act in scenes with some iconic characters and actors in the Avengers and it felt a little bit like that, where I came onto Friends, and it was season nine."
"It was certainly massive for me," he recalled of appearing on the series with stars Jennifer Aniston, Courteney Cox, Lisa Kudrow, Matt LeBlanc, Matthew Perry and David Schwimmer.
Rudd continued, explaining that while he had roles in the cult classic, Clueless, and other TV series, "I had never been a part of anything that had that kind of viewership." "Everybody was very nice, but I never could quite get over the fact that I was sitting in Central Perk, and I just really didn't want to get in the way," he admitted. "I knew no one was tuning in for Mike Hannigan, so I was like, 'Oh wow, I'm just going to sit back and kind of observe and enjoy this ride."
While Rudd's Ant-Man got his taste of being an Avenger in Captain America: Civil War, Brie Larson's Captain Marvel is the new addition to the team in Avengers: Endgame.
"I think it's a pretty kickass group, to be honest with you," Jeremy Renner, who plays Hawkeye, said. "I mean, there's not a better group of people you want to just be around, from top to bottom, just from the grass on down, and all the creators and all the talent involved. [It's a] really, really good solid group of amazing human beings."
"And Brie is so, so cool. Not just her character, but who she is kind of handling the situation," Rudd chimed in. "[She] kind of stepped into everything pretty easily, I think."
"She's not gonna be intimidated by [Chris Hemsworth]. She's strong," Renner added with a laugh. "She's strong."
Avengers: Endgame hits theaters on April 26.