Barry Allen and Iris West are, finally, set to be married in the upcoming Arrowverse crossover, Crisis On Earth-X. Now, new set photos tease that The Flash will have some interdimensional, heroic friends in attendance at the ceremony.RELATED: The Flash Debuts First Look at Elongated Man, Trejo’s Breacher & MoreThe new set photos show Kara Danvers - better known as Supergirl - and her adopted sister, Alex. As they're based on Earth-38, it's a big deal for Kara and Alex to be at Barry and Iris' wedding, even though we knew they'd take part in the fight against their evil counterparts. Also caught on camera is Caity Lotz, who plays Sara Lance aka White Canary, a character who's typically busy traveling through time with the rest of the Legends of Tomorrow.

Another recent set photo from the crossover actually suggests there will be a double wedding in the 4-part event. The photo shows Oliver Queen and Felicity Smoak alongside Barry and Iris, so there's a chance two of DCTV's biggest characters will finally get their happily ever afters.

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This year’s four-part crossover will air across two nights, beginning Monday, Nov. 27, with Supergirl and Arrow (on a special night for one week only), and concluding Tuesday, Nov. 28, with The Flash and Legends of Tomorrow.