'Dancing With the Stars' Pro Mark Ballas Suffers Injury, May Not Perform on Tonight's Show

This video is unavailable because we were unable to load a message from our sponsors.

If you are using ad-blocking software, please disable it and reload the page.

Mark Ballas may not be hitting the dance floor tonight.

ABC confirms with ET that the Dancing With the Stars pro was injured, but it is still not known if he'll be able compete this week with his partner, UFC fighter Paige VanZant.

WATCH: Mischa Barton's 'Slightly Sedated' Dancing With the Stars Debut Earns Her One of the Lowest Scores of the Premiere

Ballas, 29, appeared fine over the weekend as both he and VanZant Instagrammed a selfie from rehearsal. "Yeah, we're cute #DWTS #dwts22 #POWRIGHTINTHEKISSER," she captioned the pic.

VanZant also turned 22 on Saturday, and Ballas announced on Instagram that they were "throwin' her a big birthday bash."

Ballas and VanZant had a great first dance on the season 22 premiere of DWTS last week. The UFC fighter pulled off an impressively graceful and impassioned foxtrot with her pro partner, and earned a 21 score from the judges.

MORE: Inside Derek Hough's 'Dancing With the Stars' Injury -- What Really Landed Him in the ER

This wouldn't be the first time Ballas has sustained an injury while competing on DWTS. In May 2014, he seriously hurt his shoulder during a rehearsal with his celebrity partner, Fuller House star Candace Cameron Bure. ABC confirmed at the time that he was injured while rehearsing camera blocking, and a routine that involved him lifting the actress onto his shoulders. He still ended up performing on the show's finale.

ET will update you as this story continues to develop.

WATCH: Dancing With the Stars Pro Mark Ballas Is Engaged to Singer BC Jean

Related Gallery