Delain is a Dutch symphonic metal band formed in 2002 by former Within Temptation keyboardist Martijn Westerholt, intending for the band to be solely a project. Singer Charlotte Wessels was invited to join in 2005. The name of the band comes from the Kingdom of Delain in Stephen King's novel, The Eyes of the Dragon. In February 2021, the members decided to part ways. In June 2021, Westerholt announced that there would be a new lineup involving former and new members, with Diana Leah later being announced as the new lead vocalist in August 2022.

April Rain is the second studio album by Dutch symphonic metal band Delain. It was released in the Benelux on 20 March 2009 and was released internationally on 30 March 2009 by Roadrunner Records. It was released in Australia on 10 April 2009.