The 'Dancing With the Stars' pro spoke with ET about his sister going 'glam.'
Derek Hough and his sister, Julianne Hough, stunned at the Emmy Awards on Sunday in Los Angeles, but the two apparently hit the red carpet a little behind schedule, and Derek puts all the blame on his sister's shoulders.
"The reason why we were so late is because of her," Derek said of his younger sibling. "It's a girl thing. They just take forever to get ready, and we had another car but I didn't want to leave her by herself."
"We were ready to go hours ago, but, you know, she's got to do the whole glam thing," the 31-year-old Emmy-winning choreographer, who was decked out in a custom patterned tux, joked.
WATCH: The Best Dressed Stars at the 2016 Emmys -- See Their Stunning Looks!
Derek should be careful with his criticism of Julianne or he could face her wrath on Dancing With the Stars, where he serves as a dance pro and she has taken back her chair at the judges' table.
Derek and the whole DWTS crew had a somewhat frightening premiere last Monday when two men rushed the stage to protest Olympic swimmer Ryan Lochte's involvement in the reality competition. Derek addressed the "unbelievable" incident, saying, “It was weird.”
WATCH: Derek Hough Addresses Ryan Lochte's 'DWTS' Scare
"The energy in the room just changed," Derek recounted.
"I don't like bullies," he added. "I feel like when people are trying to redeem themselves and they're on the right path, I think we should embrace that, and not keep bringing up old stuff."
See what Lochte told ET following the DWTS drama in our exclusive interview below.
