Frank Oz was 47 in The Muppet Christmas Carol when he played the character 'Miss Piggy as Emily Cratchit / Fozzie Bear as Fozziewig / Sam the Eagle as Headmaster of Junior High Graduates / Animal / George the Janitor / Horse and Carriage Driver / Vegetable Salesman (voice)'.
That was over 31 years ago in 1992.
Today he is 79, and has starred in 130 movies in total, 61 of those since The Muppet Christmas Carol was released.
In The Muppet Christmas Carol, I think Frank Oz looks: