It's not easy for two sisters to star in some of the most ICONIC roles in pop culture history, but these siblings did just that! 

How I Met Your Mother actress Ashley Williams, and Father of the Bride star Kimberly Williams Paisley join Kate and Oliver in a star-studded edition of Sibling Revelry.

Plus, JUST WAIT until you hear how the "Father of the Bride" movie led Kimberly down the aisle in real life!