It is a "The Vampire Diaries" reunion as actor, Steven R. McQueen, joins the cast of "Chicago Fire" in a recurring role. McQueen is known for playing Elena's younger brother Jeremy on the hit vampire show.

The news comes from TVLine and "Chicago Fire" executive producer, Danielle Gelber's, tweet in which she shared a picture of herself alongside the former vampire hunter. Gelber wrote "Newest addition to #ChicagoFire. Welcome to the family! @McQueeninchains #season4."

McQueen will play the role of Jimmy Borelli. He is a new candidate who joins Firehouse 51. Borelli makes a dramatic entrance on his first day on the job and this puts him at odds with Chief Boden.

His co-star, Taylor Kinney, starred in "The Vampire Diaries" in season two as Uncle Mason. Mason was crucial to the show's second season plotline since he introduced werewolves on the vampire show. He was eventually killed off. The two actors are working together a second time.

Many fans were wondering what McQueen would do next after his exit midway in season six of "The Vampire Diaries." Audiences can expect McQueen to make an entrance in the first episode of season four since filming for the show has just begun. McQueen's addition is certainly welcome news to fans of both "The Vampire Diaries" and "Chicago Fire."

The last fans saw of "Chicago Fire" Jesse Spencer's character, Casey, he had disappeared. Dawson had arrived in his apartment to give the news of her pregnancy when she found a dead stripper and no sign of her former lover. The season ended in a crucial cliff-hanger, one that fans are raring to be solved when season four premieres in October.

As filming begins full-swing for the hit NBC show, seasoned viewers will know more about casting details, production news and spoilers in the coming months.

"Chicago Fire" airs season four on NBC on Oct. 13, 2015 at 10 p.m. EST.