Set photos are already beginning to surface online from Captain America: Civil War which began production earlier this week. And just as it did, the principal cast for Marvel's first Phase 3 movie was confirmed alongside some surprise additions. Missing from the already massive Captain America 3 ensemble however, was a certain web-slinger.

Before Spider-Man gets his own new movie in 2017, a second reboot of Peter Parker's story, set within the Marvel Cinematic Universe (home of The Avengers), the character will first show up in a Marvel movie. That movie is Captain America: Civil War and the official casting of Peter Parker is expected to be announced very soon since it seems we know who it's going to be...

For weeks Marvel has been closing in on a young actor to play their version of a high school-aged Peter Parker who's already a hero on the streets of New York and who already has his powers. Without a need for another origin story Marvel is able to jump right in and focus on new Spidey stories without having to re-establish everything, and this time they aim to start young and stay young as long as possible. It's part of a plan that we expect will involve whoever they choose to play Parker sticking around for a very, very long time, first injecting some youth in the aging Earth's Mightiest Heroes roster and later, serving undoubtedly as one of its leaders.

Asa Butterfield - 17th Annual Savannah Film Festival - Day 1
SAVANNAH, GA - OCTOBER 25: Actor Asa Butterfield attends a portrait session during Day One of the 17th Annual Savannah Film Festival presented by SCAD on October 25, 2014 in Savannah, Georgia. (Photo by Andrew H. Walker/Getty Images for SCAD) *** Local Caption *** Asa Butterfield

To do so, they're aiming to cast young and 18 year-old Asa Butterfield, star of Ender's Game and Hugo fame, is reportedly in negotiations for the part. Depending on who you trust, that is. The young British actor made the initial shortlist of five actors last month but was the rumored frontrunner. Then it apparently came down to Butterfield or Tom Holland until today when El Mayimbe dropped word that Marvel has Chosen Butterfield and is in negotiations with his representatives. He has not yet signed but we can expect that to happen soon with an announcement very quickly after.

RT! BREAKING! THE NEWS YOU BEEN WAITING FOR! MARVEL HAS FOUND THEIR NEW SPIDER-MAN! IT LOOKS LIKE IT'S GOING TO BE ASA BUTTERFIELD FOLKS AS MARVEL HAS OFFICIALLY ENTERED INTO NEGOTATIONS WITH BUTTERFIELD'S REPS! PAPERWORK HAS NOT BEEN FINALIZED YET! ONCE DEAL CLOSES EXPECT AN OFFICIAL ANNOUNCEMENT! BOOM! #MARVEL #MarvelStudios #MarvelComics #MCU #AsaButterfield #SpiderMan #CivilWar A photo posted by Umberto Gonzalez (@umbertogonzalez) on

@Borys_Kit @elmayimbe You guys got conflicting reports from conflicting sources - who's got the better person in the know? FIGHT!— Rob Keyes (@rob_keyes) May 14, 2015

THR's Borys Kit however, claims that his insiders inform him that there's no offer just quite yet but a lot of people at Marvel and Sony like him. He explains that Asa was coming in to test this week, but that others were too.

Update: Others (including Variety) have chimed in claiming that the negotiations could be for a test contract before Butterfield comes in to audition. Tom Holland already went through this process a few weeks ago and "they" loved him too.

Stay tuned for more details, and in the meantime, if you're thinking 18 years of age is "too old" to play a high school Peter Parker, a few notes to put any such complaints to rest:

  • He just turned 18 last month.
  • Actors need to be 18+ to work full work days/hours/weeks under union rules.
  • Tobey Maguire and Andrew Garfield were 26 and 28 years old, respectively, when they filmed the Spider-Man chapters that featured Peter Parker in high school.
  • Character will be 15-16 when introduced.

Next up will be more news on a director selection for the untitled Spider-Man reboot. Rumors have it potentially being titled Spectacular Spider-Man or Spider-Man: The New Avenger, and a shortlist of directors was revealed last week.

Share your thoughts on the choice in the comments.

Next: 5 Spider-Man Stories We Want to See on Film

The Avengers: Age of Ultron is now in theaters, followed by Ant-Man on July 17 2015, Captain America: Civil War on May 6 2016, Doctor Strange on November 4 2016, Guardians of the Galaxy 2 on May 5 2017, Spider-Man on July 28, 2017, Thor: Ragnarok on November 3 2017, Avengers: Infinity War – Part 1 on May 4 2018, Black Panther on July 6 2018, Captain Marvel on November 2 2018, Avengers: Infinity War – Part 2 on May 3 2019 and Inhumans on July 12, 2019.

Source: El Mayimbe, THR