Real age of Steve Martin in The Muppet Movie
In the movie The Muppet Movie, Steve Martin was:
33 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 The Muppet Movie was released:
January 1, 1979
And the day in which Steve Martin was born:August 14, 1945
Since movies usually don't take more than one year to be released since the beginning of the filming process, Steve Martin may have been one year younger or one year older than the shown age while some scenes of the movie were being filmed.