Brothers Joe and Anthony Russo are urging movie fans to keep a lid on any spoilers, as they prepare for the release of Avengers: Endgame.
With Marvel's blockbuster expected to be among one of the biggest film releases of all-time when it opens next week, fans' worst fears may be realised with footage being leaked ahead of the release date.
Taking to Twitter, the Russo brothers - who directed Avengers: Endgame as well as Avengers: Infinity War - are pleading with fans not to ruin the film for those yet to see it.
"This is it. This is the end. The end of an unprecedented narrative mosaic spanning eleven years and eleven franchises.
"For all of you who have been on this journey with us since the very beginning, sharing every high and low with your family, your friends, your classmates, your co-workers.
"Investing so deeply in every character and storyline. Laughing. Cheering. Shedding tears. Giving so freely all of your thoughts and emotions in spirited dialogue, theories, fan art, and fan fiction.
"Please know that the two of us, along with everyone involved in Endgame, have worked tirelessly for the last three years with the sole intention of delivering a surprising and emotionally powerful conclusion to the Infinity Saga."
"Because so many of you have invested your time, your hearts and your souls into these stories, we're once again asking for your help.
"When you see Endgame in the coming weeks, please don't spoil it for others, the same way you wouldn't want it spoiled for you.
"Remember, Thanos still demands your silence.
"As always, good luck and happy viewing. The Russo Brothers."
Avengers: Endgame opens in New Zealand on April 24.