‘Crisis on Earth-X’ characters
“The Flash” star Candice Patton explained why Iris’ wedding gown in “Crisis on Earth-X” had to be a creation of fashion designer Monique Lhuillier. The CW/Bettina Strauss

Candice Patton flew all the way to Los Angeles just to find the right wedding dress for Iris for this year’s four-way crossover between “Arrow,” “The Flash,” “Supergirl,” and “Legends of Tomorrow.”

During a recent press visit to the Vancouver set of “The Flash,” Patton revealed to a group of reporters that she personally visited the LA boutique of Filipino-American fashion designer Monique Lhuillier to pick a bridal gown for her character.

When asked why Iris’ wedding dress had to be a creation of Lhuillier, the actress said (via Bustle): “There’s a line in the script about how Monique Lhuillier dresses are indestructible. [Iris] really goes through it in this episode in this wedding dress and it’s still pristine.”

Unlike most real-life brides, Patton didn’t have a hard time choosing the right dress for Iris. “We flew to LA and I tried on dresses at Monique and the first dress I tried on, we were like, ‘Okay, this is it. This is great. Feels good. Comfortable,’” the actress recalled. “The most important thing was like, ‘Am I comfortable? Am I going to be able to like run away from aliens or whatever?’ It was pretty neat.”

According to BridalMusings.com, Monique Lhullier wedding dresses approximately cost $2800 to $20,000. So Iris’ wedding dress only proves that a lot of money was allotted for the crossover.

During the press visit to the set, Gustin also revealed that the wedding set was put up just for the crossover. “[The wedding set] was in this warehouse that they built a church,” the actor said (via Collider). “It was insane. You thought you were in a real church and it was beautiful. I’m excited for everyone to see it.”

While the production budget for this year’s crossover is unclear, “Legends of Tomorrow” executive producer Phil Klemmer admitted to Entertainment Weekly that they had spent a lot of their production money on the crossover, so they ended up producing a no-time-period episode. “We blow through our production money and then some with our crossover, so there’s the infamous bottle [episode],” Klemmer said. “It’s also driven by [the question] ‘How can we do it all on our standing sets for as cheaply as possible?’”

The crossover, titled “Crisis on Earth-X,” will air across two nights. It begins with “Supergirl” and “Arrow” on Monday, Nov. 27 at 8 p.m. EST, and ends with “The Flash” and “Legends of Tomorrow” on Tuesday, Nov. 28 at 8 p.m. on The CW.