Nicholas Brendon and Kelly Donovan
Anyone from the 90s will remember Nicholas Brendon from Buffy: The Vampire Slayer, but what some of you might not have known is that Nicholas has a twin brother named Kelly, who has also appeared on the show as Nicholas’s stunt double and backup. Since they are identical twins, it made it easy for them to play the same role, which many fans didn’t notice.
Kelly also worked as a set dresser for the show, so the two were able to benefit from the show’s success. Buffy: The Vampire Slayer was the only show that the brothers worked on together.