The 'DWTS' pro confirmed that he's starring in 'Jersey Boys,' which is why he won't be on 'DWTS' this season.
Mark Ballas is getting ready to hit the stage as the legendary Frankie Valli in the final months of Jersey Boys' Broadway run.
Ballas took to Twitter on Tuesday to confirm the news, writing, "THRILLED to announce I'll be playing the final "Frankie Valli" in @JerseyBoysInfo on Broadway starting Oct 18th till Jan 15th. See U there."
WATCH: Why Mark Ballas Said No to Returning to 'Dancing With the Stars'
ET broke the news last week that Ballas would be moving to New York City for a year to star in the best-selling musical, which was the reason for his absence in the upcoming 23rd season of Dancing With the Stars.
Jersey Boys, which opened on Broadway in November 2005, is one of the longest running shows in Broadway history, with over 4,600 performances by the time the musical comes to an end in January. It tells the behind-the-scenes story of singer Frankie Valli and The Four Seasons, the group responsible for classic hits like "Big Girls Don't Cry," "Walk Like a Man" and "Sherry."
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The 30-year-old dancer shared a heartfelt message with his DWTS fans last week on Twitter, thanking them for their love and support in his new endeavor in a note he penned in his sketch book.
"I wanted to hand write this letter to personally thank each and every one of you for the support over the years. I am incredibly moved and grateful for all your messages over the past 24 hours. I know many of you are concerned and curious. I want to wish my DWTS comrades luck this season," Ballas wrote. "I'll miss competing and creating outside the box, however I am looking forward to this new chapter and venture that is beginning shortly."
WATCH: 'Dancing With the Stars' Season 23: See the Hot Pairings!
Meanwhile, Season 23 of Dancing With the Stars is shaping up to become something pretty great. While Ballas won't be competing, some familiar faces are returning to the dance floor.
Derek Hough is partnering with Marilu Henner for his return after skipping season 22, while Maksim Chmerkovskiy is coming back for the first time since Season 18. The two-time DWTS runner-up has teamed up with Amber Rose for what could be one of the wildest pairs in DWTS history.
WATCH: Amber Rose and Maksim Chmerkovskiy Aiming to 'Go Out With a Bang' in 'DWTS' Debut
The dynamic duo recently opened up to ET about how they plan on blowing away the competition with a first performance that "shocks people a little bit." Check out the video below to hear more.
The new season of Dancing With the Stars kicks off Sept. 12 at 8 p.m. ET/PT on ABC.