The CW Crossover
Executive Producer Greg Berlanti confirms upcoming musical crossover of "Supergirl" and "The Flash." Instagram/Grant Gustin

Executive Producer Greg Berlanti has confirmed a crossover between The CW’s “Supergirl” and “The Flash.” To take advantage of stars Melissa Benoist and Grant Gustin’s vocal talents, it will be a musical one.

According to The Hollywood Reporter, Berlanti made the announcement on Thursday during the Television Critics Association’s summer press tour. While he again confirmed that there will be a four-way crossover which will involve “Supergirl,” “The Flash,” “Arrow” and “Legends Of Tomorrow,” he also shared that there will be a separate musical crossover for just “Supergirl” and “The Flash.”

The two-way crossover, which will not air until mid-season, will definitely have Benoist and Gustin breaking out in tune. After all, the two actors each had their time on Fox’s “Glee” that relied heavily on their vocal prowesses.

Ali Adler, a producer of “Supergirl,” even shared that Benoist and Gustin have sang together on location. "When they're not flying or punching, they're singing on set. It's amazing,” she said.

Fans will get the opportunity to hear these two talented singers together on the crossover, which Berlanti said will consist mainly of covers. He also urged, maybe humorously, that fans can get on Twitter to request specific numbers. In addition, he shared that the team is looking to create at least one original song.

IGN adds that it is likely for other cast members to join in on the singing. However, Berlanti did share that “The Flash” actress Danielle Panabaker had already excused herself from any musical numbers.

Another thing that fans can expect to see in this CW crossover is a new villain, who could have a musical feature as well, although Berlanti admitted they have not yet decided on what villain it will be.

Lastly, the shows’ producers also shared that an undisclosed main character from the comic series will explore his or her sexual orientation in the next season. "One of the characters on one of the shows is going to explore their sexuality and coming out," said Andrew Kreisberg, a producer on all four DC television shows.

“Supergirl” and “The Flash” are set to air in The CW in the US this October. Australian audiences can catch both shows on Syfy and Fox8 respectively.