Tom Holland was 20 years old while filming Spider-Man: Homecoming and 21 years old when the movie was released, playing a 15-year-old Peter Parker.

Since your query is simple, here’s a compact “Quick Scoop”-style breakdown:

  • Filming age: 20 years old during principal photography for Spider-Man: Homecoming.
  • Release age: 21 years old when the film hit theaters in 2017.
  • Character age: Peter Parker is written as about 15 years old in Homecoming.

So, if you’re writing or posting about “how old was Tom Holland in Homecoming,” the clean answer most people use is: he was 21 at the time of release (about 20 during filming), playing a 15-year-old Spider-Man.