"I've been a fan of this show since it came out," Ballas told ET's Cameron Mathison on Tuesday. "I've seen it on [London's] West End, I've seen it in Vegas, I've seen it numerous times in New York, and it's actually coming to a close… this is the last run, and I'm going to be able to play the final Frankie on Broadway, so this is incredible. I'm super excited."
Jersey Boys -- which 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" -- opened on Broadway in November 2005 and is one of the longest running shows in Broadway history, tallying over 4,600 performances by the time the musical comes to an end in January.
According to Ballas, musical theater was his passion long before moving to Los Angeles to pursue a television career, and getting the chance to star as Valli in the show's final months on Broadway means more than he could have asked for.
"When Jersey Boys came out, I still remember it was '05 or '06 in England, me and all my buddies went to see it," the 30-year-old DWTS pro recounted. "I remember just being blown away."
"I was a fan of the Four Seasons for years. My grandfather loved them, my dad loved them. So I was very familiar with the music," he continued. "I've seen the Broadway show maybe nine times… so to be able to [play] that role and become that character is a huge honor."
The honor is even greater when you consider who has final approval over the actor that gets to play the legendary crooner: Frankie Valli himself, as well as the Four Seasons' songwriter and keyboardist, Bob Gaudio.
"He's in New York right now and he just keeps sending me pictures of Jersey Boys posters," Ballas said of his buddy. "He was super thrilled for me."
"It's kind of more about the gestures and the charisma rather than the technical aspect of it," Ballas explained. "So, I'm looking forward to spending time focusing on being a musician and an actor first."
However, there are a few aspects of the show that he's going to miss, including "the competing, being able to create and be creative, [and] of course, my friends and my fans."
While Ballas said he didn't know if returning to DWTS as a dancer was something he saw in his future, he was more than enthusiastic about returning as a guest judge.
"That would be really nice to sit behind the desk, so don't rule that out," Ballas said. "Hopefully at some point. Maybe this season, who knows?... Jersey Boys is dark on Mondays so if they need me to get out there for some judging, I can make it. I can make that happen."
"It's a dance show. Have fun," he added. "Get serious, be competitive, be strong, push the boundaries at days when you think you can't, be prepared for a long haul, but most importantly, don't overthink it."