Stay alert, Marvel fans: spoilers for how Avengers: Endgame ultimately concludes have leaked online. If you want to avoid being spoiled, now is the time for action. We recommend muting any and all Avengers-related hashtags on Twitter--maybe just stay off social media, if you can, altogether. If you can't stay offline, we've compiled a list of tips for preventing spoilers from bleeding into your social feeds. If you're looking for some spoiler-free Endgame content, a new trailer has released that sees War Machine and Ant-Man having a funny interaction.

Endgame hits cinemas in Australia on April 24 and comes to the United States on April 26, so the leak comes about 10 days before the film's release. Spoilers are always a concern, but the profile is higher with Endgame considering the dramatic conclusion to Infinity War where Thanos snapped his fingers and wiped out half of the galaxy.

In the time since the Endgame leak, the Marvel subreddit has gone on lockdown. The moderators have confirmed this is temporary, while they sift through posts and ensure that there's nothing that could ruin the experience for eager fans. "Spoilers are bad. We strive to keep this community spoiler-free, and due to recent events, we must take these measures to ensure that," reads a post on the subreddit.

"Until we are more satisfied with our filter's ability to weed out the influx of new spoilers, all posts will be subject to approval. This shouldn't last too long. If your post is removed, is NOT a spoiler, and not approved within a reasonable time, message one of the mods and we will help you out. Also feel free to message us if you have any other questions concerning this."

Directors Joe and Anthony Russo have also issued a response to the Avengers: Endgame spoilers leak. In an open letter shared on Marvel Studios' official Instagram and Twitter accounts with the hashtag #DontSpoilTheEndgame, the duo said they "have worked tirelessly for the last three years with the sole intention of delivering a surprising and emotionally powerful conclusion to the Infinity Saga."

They continued: "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."

Endgame is believed to wrap up more than 10 years worth of Marvel Cinematic Universe storytelling that began back in 2008 with the original Iron Man. The film marks the end of the MCU Phase 3. Marvel is expected to provide the first details on Phase 4 after the release of Spider-Man: Far From Home in July, so keep checking back for that.

Ahead of that, Disney and Marvel have released a new Endgame trailer. This one celebrates the journey so far, giving each character that has been pivotal to getting us where we are some time in the spotlight, so fans can reminisce.

Robert Downey Jr., Chris Hemsworth, Chris Evans, Mark Ruffalo, Brie Larson, Sebastian Stan, Scarlett Johansson, Don Cheadle, Jeremy Renner, Danai Gurira, Paul Rudd, and Josh Brolin star in Endgame. Tickets went on sale last week, and so far presales have far exceeded those for Captain Marvel, Infinity War, Aquaman, and Star Wars: The Last Jedi combined.