Throughout the runs of The X-Files, Millennium, and The Lone Gunmen, there have been actors and celebrities who have appeared in episodes credited as playing either "Himself" or "Herself".

"The X-Files"Edit

• Ken Hawryliw in "Unusual Suspects"
• Jerry Springer in "The Post-Modern Prometheus"
• Téa Leoni in "Hollywood A.D."
• Garry Shandling in "Hollywood A.D."

"The Lone Gunmen"Edit

• Edward Woodward in "Planet of the Frohikes" (voice only)