How old was Will Arnett in Monster-in-Law?

Knowing a celebrity’s age during a specific movie can be oddly satisfying. That knowledge can reshape how we view their performance. Let’s reveal how old they were when the cameras rolled.

In Monster-in-Law, Will Arnett took on the role at the age of:

34 years old

That was the real age of the celebrity according to our calculation.

Our method involved using the first calendar day of the release year of Monster-in-Law:

January 1, 2005

And the day Will Arnett was born, which is:

May 04, 1970

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