The 'Flash' & 'Supergirl' Casts Can Sing In Real Life, So The Musical Crossover Will Have Star Power To Spare

Jack Rowand/The CW

The musical crossover of The Flash and Supergirl, which stars Darren Criss as the Music Meister, is a no brainer for Glee fans everywhere. Both lead actors Melissa Benoist and Grant Gustin starred alongside Criss on the musical comedy. We've seen them perform many a musical number on TV before. However, pretty much everyone in the cast of The Flash and Supergirl can sing. This one night only event won't have a weak moment.

Let me tell you, the CW's bench is deep. Did I do that sports metaphor right? I'm clearly a theatre kid at heart. Even Crazy Ex-Girlfriend star and writer Rachel Bloom wrote a song called "Superfriends" for the episode. Another song called "Runnin' Home To You" was written by new musical theatre composers, and Academy Award winning lyricists, Benj Pasek and Justin Paul from Dear Evan Hansen and La La Land. As for the performers, The Flash actually went above and beyond the call of duty, bringing in some ringer singers from Arrow and Legends of Tomorrow.

This list is heavy on dudes, and I apologize for that. Most of the Supergirl ladies won't be in the episode, and neither Candice Patton nor Danielle Panabaker have any professional musical experience. That isn't to say that they definitively can't sing, but there's no proof at this moment.

That said, while you know that Benoist, Gustin, and Criss have the chops to make this crossover epic, here are some more voices to look forward to.

Jeremy Jordan

Between both casts, Jeremy Jordan is currently the biggest Broadway star in the bunch. After debuting as a replacement for Tony in West Side Story, he also performed on Broadway in Rock of Ages, then originated the role of Clyde in Bonnie and Clyde. He then starred as Jack Kelly in Newsies and was nominated for a Tony Award.

He was also on the NBC series Smash in its second and final season. RIP Smash, forever in tech. Do yourself a favor and spend some time down the Jeremy Jordan rabbit hole on Youtube, whether your jam is West Side Story, or Barbra Streisand, or even a medley of Disney princess ballads. He's an incredible performer.

Jesse L. Martin

Martin has already sung on The Flash, but he's famous for playing Tom Collins in the original (and then movie) cast of Rent. His other Broadway credits are straight plays, but he performed "Razzle Dazzle" from Chicago at the 2005 Tony Awards, after Jerry Orbach passed away, a fitting tribute to their shared Law & Order and Broadway roots.

Chris Wood

Like Grant Gustin, Wood studied Musical Theater at Elon University in North Carolina. You can find both of their college performances if you look hard enough.

He toured as Melchior in Spring Awakening after college. More recently, he also sang a bit on The Vampire Diaries in a karaoke scene.

Carlos Valdes

Valdes is an actual recording artist known as "Tha Los," but he was also on Broadway in Once and in the touring cast of Jersey Boys. Valdes studied Musical Theater at the University of Michigan — he's actually a member of Starkid, the company behind A Very Potter Musical which starred Darren Criss! The reunions in this crossover keep on coming.

Victor Garber

I admit, Garber is the most legendary Broadway star in the Arrowverse. He was nominated for a Tony Award in 1994 for Damn Yankees. He has done various benefit and limited productions, and originated the role of John Wilkes Booth in Sondheim's Assassins. Garber's other Broadway musical credits include They're Playing Our Song, Sweeney Todd, and Little Me.

Garber has also lent his singing voice to Legends of Tomorrow, in which he pretended to invent "Edelweiss" from The Sound of Music.

John Barrowman

The actor behind Malcolm Merlyn on Arrow has done an insane amount of singing on stage, mostly in London. His copious musical theatre credits include Anything Goes, Miss Saigon, Sunset Boulevard, Phantom of the Opera, Aspects of Love, Evita, Hair, Cinderella, Company, and Chicago.

Tom Cavanagh

This isn't singing, it's just more musical fun from the Flash cast. Valdes and Martin also harmonize off-screen with Rick Cosnett, which is fun to follow online.

BONUS: Laura Benanti

I know, both Astra and Alura Zor-El are dead on Supergirl, but I can't talk about the singers on this show without a bit of Benanti, right? Let's all think of warmer, calmer times with this #Ham4Ham show throwback.

Suffice to say, there's a lot of talent in these two casts. I also love this video of Melissa Benoist and Sarah Hyland from Modern Family singing "Freedom" by Kerrigan and Loudermilk. We could do this all day. There are so many good singers on television right now, how can you not be pumped for musical episodes like this one?!