How old was Cameron Monaghan in The Three Investigators and the Secret of Terror Castle?

Have you ever watched a movie and found yourself curious about a celebrity’s age at the time? It connects us more personally to their story and evolution. Let’s reveal how old they were when the cameras rolled.

In The Three Investigators and the Secret of Terror Castle, Cameron Monaghan took on the role at the age of:

15 years old

That number reflects the celebrity’s real age when the movie was made.

We calculated the age by referencing the first day of the year The Three Investigators and the Secret of Terror Castle was launched:

January 1, 2009

And the birth date of Cameron Monaghan:

August 16, 1993

As films generally take less than a year from filming to release, the age of Cameron Monaghan during production could differ by a year from what’s shown.