Matthew Garber from Mary Poppins
Surprising how little information there is about Matthew who played Michael Banks in Mary Poppins and had a role in another movie called the Gnome Mobile. Then, he died of pancreatitis at about 19 years old. The circumstances are still relatively unknown although his brother said he probably caught it from eating bad meat in India. Kind of sad.
Re: Matthew Garber from Mary Poppins
That explains why he didn't do any more movies. Nineteen is so very young. Very Sad.