The rumors were there the entire postseason run.

Now that the Knicks are the NBA champions, Ben Stiller can confirm it — he is, in fact, making a documentary about the team.

The Hollywood actor, producer and director ended all the speculation during an appearance on on Jalen Brunson and Josh Hart’s “Roommates Show” on Wednesday.

Stiller, an avid Knicks fan, said the “dream project” will be made with A24 for HBO and has the “full cooperation” of the NBA and MSG.

But the multipart doc will go deeper than just the 2026 NBA Finals run, Stiller said.

The confirmation from Stiller comes after Page Six reported last week that Stiller was indeed making a Knicks program for HBO.

“It’s kind of gonna be about all eras of the Knicks,” Stiller said on the show. “And this team, obviously, there’s a culmination here of something that has been going on for a long time. So, it’s super exciting. And it’s great to have all this access to your team, which is great. And we’re probably going to be shooting a little bit more during next season.”

He said the program, which does not have set number of episodes yet, all came together recently and that it will be worked on over the next year. A release date is not yet clear. Stiller said that owner James Dolan gave the green light for the project and gave Stiller and his team access for it.

Stiller took to X to share the news on his personal account.

“Couldn’t be more excited to make this doc with @a24 and @hbo about the NY KNICKS!!!!!!” he wrote.

Stiller, a fixture on Celebrity Row at Madison Square Garden and courtside on the road, was seen filming the Knicks’ playoff run from his phone, and he shared some of the snippets to social media as New York won its first NBA title in 53 years.

Stiller added that the project still does not have a title, but at the very least, it is happening.