Frank Welker was 43 in DuckTales: The Movie - Treasure of the Lost Lamp when he played the character 'Additional Voices (voice)'.
That was over 34 years ago in 1990.
Today he is 78, and has starred in 386 movies in total, 293 of those since DuckTales: The Movie - Treasure of the Lost Lamp was released.
In DuckTales: The Movie - Treasure of the Lost Lamp, I think Frank Welker looks: