Definition of "boyishness"

That slightly wide-eyed boyishness has given him a career playing ordinary people in extraordinary circumstances, whether that be everyone's favourite idiot-savant Forrest Gump (1994), a pilot who saves the day in Sully (2016), or the beleaguered Captain Miller of Saving Private Ryan (1998).

2021 February 9, Christina Newland, “Is Tom Hanks part of a dying breed of genuine movie stars?”, in BBC‎