Like co-star Dirk Blocker he was only credited under ‘also starring’ on the end credits in Season One despite appearing in every episode. In Season Two they were promoted to main cast but the title sequence wasn’t altered to include them along with the rest of the main cast. They are however both credited as ‘starring’ in the opening credits that show immediately after the title sequence before the production credits are shown.
He grew his trademark flattop for his role in the 1997 movie, Dead Men Can’t Dance. After growing it his agent persuaded him to update his headshots and keep the haircut.
Is married to Tammy McKinnon with whom he has a daughter, Caitlyn and a son, Owen.
All of Scully’s opera singing is Miller’s own.
He appears in The X-Files (S06E13) as a sheriff's deputy who initially attempts to arrest Special Agent Dana Scully, and later nearly gets dragged into a toilet.