How old was Seth MacFarlane in Family Guy: Up Late with Stewie & Brian?

It's common to wonder how old a celebrity was when they starred in a particular film. That knowledge can reshape how we view their performance. We’re about to uncover that piece of the puzzle.

While Family Guy: Up Late with Stewie & Brian was being made, Seth MacFarlane was:

33 years old

After checking the dates, that’s the calculated age of the celebrity.

This age was calculated based on the beginning of the release year of Family Guy: Up Late with Stewie & Brian:

January 1, 2007

And the known birth date of Seth MacFarlane:

October 26, 1973

Because movies often premiere within a year of starting production, Seth MacFarlane might have been either one year younger or older while filming some scenes.