Joshua set for Whyte rematch at London's O2 Arena in August
Joshua knocked out Whyte in the seventh round of their British and Commonwealth title clash in December 2015, avenging a loss he suffered when the pair fought as amateurs.
The 33-year-old beat American Jermaine Franklin on points in April, his first win in more than two years after back-to-back defeats to Ukraine's unified champion Oleksandr Usyk.
"I've been clear that my plan is to be active this year," Joshua said. "I'll be ready to fight. I look forward to dealing with business."
Whyte also beat Franklin last November after losing his only world title challenge to Tyson Fury in April 2022.
"I'm looking forward to returning to the London O2 and going to war," Whyte said. "It's 1-1, so this is the decider."