#22: Kelly Donovan and Nicholas Brendon

Born three minutes apart, identical twins Nicholas Brendon and Kelly Donovan have shared more than just childhood memories—they’ve also shared the screen. Best known for his role as Xander Harris on Buffy the Vampire Slayer, Nicholas brought humor and heart to the cult-favorite series.

But when the show called for tricky double scenes, Kelly seamlessly stepped in as his brother’s stand-in, even portraying Xander’s doppelgänger in a memorable episode. While Nicholas continued acting, Kelly opted for work behind the scenes.