Paul Rudd reacts to 'Avengers: Endgame' breaking box office records

Paul Rudd stopped by "GMA" Friday morning to talk about "Avengers: Endgame" -- but mostly to leave the anchors and the audience in stitches.

Per usual, the funnyman had everyone laughing time and again with his quick, witty one-liners and genuine reactions to comments.

When asked what he thought of "Avengers," having seen it for the first time earlier this week, "I thought it was great ... I'm a little biased [though]."

He's still not revealing any spoilers, though the film is now in theaters and breaking all kinds of opening weekend records.

"Nobody has said anything to me, [and] until they do, I'm going to keep my mouth shut," he said.

Rudd added that his kids loved the film, too, and are "really into" the Marvel Cinematic Universe.

"They were blown away," he said. Still, his 9-year-old daughter is trying to pry secrets from him. "She's like, 'You can tell me, I'm not gonna tell anybody."

He's resisted though, he said.

And finally, after Jeremy Renner had appeared on "GMA" earlier this week, raving about his dear friend, Paul returned the favor and couldn't stop gushing about his talented co-star.

"He's the best guy," he said, "and an incredible actor."

"Endgame" could be on pace for a $300 million domestic opening at the box offices, according to Box Office Mojo. That's in addition to already setting a single-day record in china with $107 million.

After George Stephanopoulos told Rudd the film is already smashing box office records, he simply replied, "Well, I had very little to do with that, but thank you."

"Avengers: Endgame" is in theaters now.

ABC News and Marvel are both part of parent company Disney.