Briton, whose most recent activity was spent on reality TV programme in jungle, makes announcement alongside promoter Eddie Hearn with whom he has signed three-fight deal.
Amir Khan targets April return to boxing 'to make up for lost time'
Former welterweight world champion Amir Khan will end a near two-year hiatus from the sport with a bout in Liverpool on April 21 against an unnamed opponent he announced on Wednesday.
Khan, 31, whose most recent activity was spent on a reality TV programme in the jungle, made the announcement alongside British boxing promoter Eddie Hearn with whom he has signed a three-fight deal.
The 2004 Olympic lightweight silver medallist's last outing was back in May 2016 when he stepped up to middleweight to face Mexico's star pugilist Saul 'Canelo' Alvarez and was knocked out in the sixth round.
Khan said his ambition is to taste what it is like to be world champion again having been the unified welterweight world champion - holding the WBA belt from 2009-12 and the IBF version in 2011.
"I'm determined to win another World Championship and I'm confident I've got the right team behind me to help me do so," Khan said.
"I've been out of the ring for too long, and I'm desperate to make up for lost time, starting in April."
Hearn said it was great to have Khan back fighting in England - his last fight on home turf was beating Julio Diaz in 2013 - and pledged to bring him top names as opponents.
"The plan is to box in April and then again in August or September in preparation for a super fight in Winter 2018," Hearn said.
"The target is to provide him with the biggest fights possible with a mouth-watering list of names including the likes of Manny Pacquiao, Kell Brook, Keith Thurman and Errol Spence.
"I'm excited to get started and looking forward to a huge night of boxing on April 21."