Jordan Strauss, Invision/Associated Press
In this April 23, 2018 file photo, Stan Lee, left, and Keya Morgan arrive at the world premiere of "Avengers: Infinity War" in Los Angeles.

Warning: Spoilers for “Avengers: Endgame” below.

SALT LAKE CITY — Stan Lee might have played Stan Lee in his “Avengers: Endgame” cameo.

In “Avengers: Endgame,” Captain America (Chris Evans) and Iron Man (Robert Downey Jr.) travel back in time to the 1970s to retrieve Hank Pym’s particles and the Tesseract.

When they do, the audience sees a car with a bumper sticker that reads, “Nuff said!”

Why does that matter? Well, Stan Lee used to sign off all of his Marvel Comics with the phrase, “Nuff Said!”

“Through time travel and nostalgic love, Marvel delivered the most endearing and heartfelt Stan Lee cameo of them all,” according to Fatherly.

“Avengers: Endgame” director Joe Russo said that they came up with the idea during production before Lee passed.

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“It seemed like fun when we originally had the idea, before Stan passed,” Joe Russo told Entertainment Weekly. “Oh, what did Stan look like in the ’70s?

“It’s sort of the hippie era, and Stan’s cameoing as a hippie and it’s the free-love era. He’s saying, ‘Make love, not war!'”

The Russo brothers confirmed that “Endgame” will be Lee’s final cameo in the Marvel Cinematic Universe despite rumors he filmed a scene for “Spider-Man: Far From Home,” which arrives next month, SlashFilm reported.