Real age of Frankie Muniz in Walk Hard: The Dewey Cox Story
In the movie Walk Hard: The Dewey Cox Story, Frankie Muniz was:
21 years old
That was the real age of the celebrity according to our calculation.
The calculation of the shown age took into account the first day of the year in which the movie Walk Hard: The Dewey Cox Story was released:
January 1, 2007
And the day in which Frankie Muniz was born:December 05, 1985
Since movies usually don't take more than one year to be released since the beginning of the filming process, Frankie Muniz may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.