With today marking the final day of Comic-Con International, the final part of Marvel's three-piece Avengers: Infinity War concept art poster designed by artist Ryan Meinerding has been revealed and it gives us our first official look at Chris Evans' bearded Steve Rogers, as well as a blonde Natasha Romanoff.

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While Marvel hasn't officially posted the artwork online, a fan that was on hand at the convention took to Twitter to post a snap of the final poster.

Meinerding, who was on hand at the convention this weekend to sign some of his work, took to Instagram earlier today to officially post a high-res version of the first poster, promising to post the last two throughout the day. The posters, which are exclusive to Comic-Con International, tease the Avenegers and the Guardians of the Galaxy teaming up to take down the Mad Titan, Thanos.

You've been asking, so here it is. Part one of my Infinity War SDCC poster set. I'll be uploading the rest throughout the day. I'm about to head into the hall for the last day. I can't believe it's nearly over for another year! Oh and for those of you attending today I'll be doing a live demo at the Wacom booth at 10am. @robertdowneyjr @zoesaldana @karengillanofficial @imsebastianstan @tomholland2013 @doncheadle @markruffalo @chadwickboseman #infinitywar #avengers #sdcc #sdcc exclusive #sdcc2017 #marvel #marvelcinematicuniverse #ironman #gamora #tonystark #wintersoldier #nebula #hulk #hawkeye #mantis #blackpanther #spiderman #drstrange #warmachine A post shared by Ryan Meinerding SDCC #5555 (@ryan_meinerding_art) on

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Directed by Joe and Anthony Russo, Avengers: Infinity War boasts a sprawling ensemble cast that includes 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 arrives in theaters May 4, 2018, with the untitled sequel opening May 3, 2019.