On 29 April 2017, Joshua won a boxing match against Ukrainian boxer Wladimir Klitschko to add the WBA and IBO title to his collection.
The bout drew a record post-war British boxing crowd of 90,000 at Wembley.
The Briton wobbled Klitschko with a left before landing a series of clubbing blows, including a cracking right uppercut, which sent the Ukrainian to the canvas. After Klitschko made it up once more, Joshua teed off on him in the corner and the ref stepped in at 2:25 of the second-to-last round.
The Ukrainian had also been sent crashing to the floor in the fifth round as the 27-year-old British fighter took his ideal record to 19 stoppage wins in 19 fights.
Joshua retains his title and remains undefeated, stretching his record to 19-0 (all inside the distance).More news: Palestinians injured in West Bank clashes with Israeli troops
Klitschko, who suffered his first stoppage defeat since Lamon Brewster beat him in 2004, was full of respect for his conqueror. "Thank you for coming out to a attractive night of boxing".
There is now little questioning the extent of his abilities, but in less than 24 hours after establishing himself as the world's leading heavyweight, Joshua has already begun to make notes on changes he needs to make.
Referring to Klitschko, Joshua continued, "He is a role model in and out for the ring and I've got huge respect and love for Wladimir Klitschko". I will play with you.
"Anthony Joshua challenge accepted", said Fury. As I said, I'm not flawless but I'm trying and if you don't take part you're going to fail.
"It was one of the best heavyweight fights I've seen and Klitschko will probably say he wants a rematch", Hearn told reporters.More news: Tad Cummins slept with teen student, his wife says
The 41-year-old, who has dominated the division over the past decade, was also knocked down by Joshua in the fifth round.
Joshua stopped Klitschko in the 11th round after both boxers suffered knock-downs during the Wembley thriller. "He got up, he fought back and he won the titles".
Still, Joshua took punishment.
"If Wladimir wants to fight, I will fight Wladimir once again", Joshua said.
"I have a rematch clause in the contract which I can execute".More news: New scrutiny of timeline after Arkansas executes 4th inmate
Speaking on BBC Radio 5 live's Sportsweek programme on Sunday morning, Wilder said: "My plans are to get the WBO belt and once I get that, if I'm given a mandatory challenger, get that out of the way and set up a mega fight early in 2018".