Tom may have been playing a teenage Peter Parker when he was cast in Captain America: Civil War and Spider-Man: Homecoming, but he was already 20 years old. His career started six years before that, though, with his first on-screen role in The Impossible (2012). The movie hit theaters when Tom was 16, but he was just 14 years old during filming.
Sophie Marceau - 14 years old in "la boum"
and
Natalie Portman - 12 years old in Léon