What actors and actresses appeared in Tag - 1999?

You're likely thinking of the film "The Iron Giant" (1999), which features a character named "Tag".

Here's a list of the actors who voiced the main characters in the film:

* Eli Marienthal as Hogarth Hughes

* Jennifer Aniston as Annie Hughes

* Harry Connick Jr. as Dean McCoppin

* Vin Diesel as the Iron Giant

* Christopher McDonald as Kent Mansley

* John Mahoney as the Narrator

It's possible there's another film or piece of media called "Tag" from 1999, but without more context, it's hard to say for sure.