Spider-Man isn't so new to the Marvel-verse after all.

Tom Holland, who plays teen Peter Parker in the upcoming "Spider-Man: Homecoming," confirmed a long-held fan theory about Peter's first introduction in the Marvel Cinematic Universe.

Holland himself debuted as the character in "Captain America: Civil War," but a younger version of Peter appeared way back in 2010's "Iron Man 2."

In that movie, there's a scene where a little boy wearing an Iron Man mask faces off against a killer robot. Tony Stark (Robert Downey Jr.) flies in at the last second to save the boy, and then tells him, "Nice work, kid."

Fans theorized that this kid in the mask was Peter Parker. He would be the right age, the Expo was held in Queens (Peter's neighborhood), and he's a big fan of Iron Man.

Now, Holland has confirmed that theory. "It is Peter Parker," he told the Huffington Post.

He added, "I can confirm that as of today. I literally had a conversation with Kevin Feige only 20 minutes ago. Maybe I've just done a big, old spoiler, but it's out there now. It's cool. I like the idea that Peter Parker has been in the universe since the beginning."

"Spider-Man: Homecoming" opens in theaters July 7.