The wedding of The Flash starts "Crisis on Earth-X" tonight.
Interview with Candice Patton about Iris West's wedding in the "Crisis on Earth-X" crossover
The CW has released promo art for the "WestAllen" wedding.
The wedding of Barry and Iris will be part of this year's DC TV crossover.
Fans now have a definitive answer on if Barry Allen and Iris West will get married in Flash Season 4.