In an interview with the Italian version of Vogue, Tom Holland has confirmed he will be appearing in
Avengers: Infinity War. There's currently no web version of the article, but you can read a picture and a Google Translated version below.
The approval for the role in Spider-Man arrives in person even from Robert Downey Jr. and Chris Evans. "It is they who have convinced Marvel: the producers wanted to be sure that I was the right person before entrusting three films over the next four years, including Avengers: Infinity War."
