In his usual light-hearted style, Avengers: Endgame star Robert Downey Jr. recently asked Twitter to decide whether Mark Ruffalo, Chris Evans or himself had the best mustache. The three actors have all sported facial hair, and Downey Jr. sought to determine once and for all whose facial foliage was the people's favorite.Ruffalo took a strong lead in the thread early on, with a collage of his array of impressive facial stylings garnering over 55 thousand likes at time of writing. There were also strong write-in campaigns from fans of almost every male star of the upcoming Avengers: Endgame. Paul Rudd was a recurring mention. Tom Hiddleston's invisible mustache and his turn as Steve on MTV After Hours were popular choices. Sebastian Stan showed consistently slick facial fur.RELATED: Avengers Directors Say No One's Guessed Endgame's Ending YetThe late Stan Lee was brought into the fray, pulling at the heartstrings of Marvel fans throughout the thread. Downey Jr. remained silent on the debate for several days, letting the thread accumulate a host of responses. With each new day, new actors were added to the ever-growing roster of mustached Marvel heroes. Even Gwyneth Paltrow and Scarlett Johannson's names were added to the list of potential winners of the Marvel mustache battle royale.However, no one actually ended up winning the battle of the mustaches. User @hllndstark altered the image Downey Jr. used to start the thread, making one small change - the mustaches of all three initial contenders were shown to be fading away in a manner similar to the victims of the now-infamous snap in the finale of Avengers: Infinity War. RELATED: Tony Stark's MCU Arc Is a Shakespearean Tragedy (and Won't End Well)

This post, while not the most popular in terms of likes, garnered Downey Jr.'s favor, and he has since reposted it with the declaration that '"none of them" wore it best, apparently.' Fans responded positively to the decision, with the post being retweeted almost as many times as the initial poll.

With Avengers: Endgame only a few weeks away, it is a relief to know that, at least for now, this vital debate has been settled. Like the ending of Avengers: Infinity War, the answer may not have been what anyone expected, but it certainly sparked interest and gave Twitter something to discuss in the final stretch before Phase 3 of the Marvel Cinematic Universe comes to its conclusion later this month.