Since Monday, Avengers: Infinity War directors the Russo brothers have been using social media to tease the imminent arrival of the anticipated Marvel Studio film's first trailer. On Monday, the pair posted an image of anthropomorphized number 3, and followed up today with a similarly cartoon-ized number 2, seemingly cementing Thursday as the day fans across the globe will catch a glimpse of the biggest superhero team-up movie to date.RELATED: Avengers: Infinity War Trailer Images LeakAvengers star Mark Ruffalo, who portrays both the Hulk and his smaller, smarter half Bruce Banner, has joined in on the fun. The actor has also taken to social media, tweeting "Something big is coming...," a phrase that ads further fuel to the theory that the Infinity War trailer's release is coming this week. A report from mid-November suggested the teaser trailer for the superhero epic would likely arrive in “early December.”

The playful teases by Ruffalo and the Russo brothers arrive following leaked of images and footage, which ignited speculation that the release of the first trailer was indeed imminent. The beginning of the filmmakers’ countdown also coincided with the publication of Vanity Fair’s cover story commemorating the 10th anniversary of the Marvel Cinematic Universe.

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Directed by Joe and Anthony Russo, Marvel’s Avengers: Infinity War stars Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Samuel L. Jackson, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Pom Klementieff, Scarlett Johansson, Tom Holland and Anthony Mackie. The film opens May 4, 2018.