It’s Julianne and Derek Hough’s Sister, Katherine!
Katherine may not put on her dancing shoes as often as her brother and sister, Dancing With the Stars pros Derek and Julianne Hough, but she knows how to party in style.
Over the weekend, she celebrated her birthday with her siblings and their pal Maria Menounos with a big bash, and Julianne posted this pic of them with her monkey “soulmate”!
“Happy birthday to my beautiful sissy @katherineh82 too! You looked beautiful last night!” she captioned her Instagram pic. Aww. They look a little bit similar, but we weren’t able to immediately tell they were sisters.
Did you know it was Julianne and Derek’s older sister, or did we stump you? Tell us below, and click here to play more “Guess Who?”