Derek Hough suffered numerous injuries after an accident occurred during a "Dancing With The Stars" season 15 rehearsal for the ABC reality hit's 10th Anniversary Special on Monday night, resulting in a trip to the hospital. His sister and "DWTS" judge Julianne Hough revealed his condition is "serious." Does this mean Derek Hough will miss the rest of season 15?

On Good Morning America on Thursday morning, Julianne Hough gave an update on her brother Derek's condition - and it was not comforting to "DWTS" fans.

"It is serious," Julianne said, according to E! News. "I know that he broke his toe on his right foot and sprained his ankle in two different places on his left foot trying to get ice for the toe."

"He's super-bummed out because he's super-passionate about what he does and he wants to be there for his partner," Julianne said.

But Derek isn't giving up hope that he'll be able to return to "DWTS" season 15 as soon as his injuries heal.

"I'm doing everything I possibly can to have a quick recovery and I'm determined to come back stronger than ever, " he captioned an Instagram photo of his feet while in the hospital. "This is new territory for me , I'm usually able to work through injury but this one has literally floored me. But like I said before I'm determined to come back all gunz blazing ... soon!!!"

But Sasha Farber, a longtime member of "Dancing With The Stars" who subbed in for Derek's 10th Anniversary Special performance, is confident Derek won't be missing out on the whole season.

"Derek will continue," Sasha said with confidence on Good Morning America. "He's a trooper, he's a fighter."

Sasha will also take Derek's place as celebrity Nastia Liukin's partner.

According to E! News, Derek is set to remain in Los Angeles to rehab his injuries. He was photographed walking with crutches on Wednesday while heading to a dance studio.

Derek explained how he got his injuries in his Instagram caption, writing that "a fluke accident happened that involved a light and some stairs. Can't believe it, wish I had a cooler story to tell."