The Avengers are assembling once again for a very sweet cause.

Downey, in true Tony Stark fashion, promised to one-up Evans' gift in a video message.

“Bridger, youre a rockstar, Downey Jr. said.

Tom Holland and Robert Downey Jr.

Credit: Todd Williamson/Getty Images

I hear [Captain America] sent a shield your way.

Im gonna do one better, you call me on your next birthday.

I got something special for you.

By the way, that’s a promise.

A promise beats a shield.”

(Bridger was appropriately dressed for the call, with an adorable Spider-Man costume of his own.)

I want to say you are so brave, mate, he added.