The pair - who had been together for six years - confirmed the news in a statement which was tweeted out by 34-year-old Nikki, and first reported by Us Weekly magazine. Tonight, they announced on Instagram that they've called off the wedding.
Cena proposed to Bella a year ago at Wrestlemania 32.
Nikki commented on her break up with Cena by simply saying, "we love you all" while including a section from the Us Weekly interview including the couple's public statement.
Us broke the news of their split.
According to Cena, Bella couldn't have been more gung-ho about signing the agreement, which only made him feel "super bad".
"I'm already ready to go there and it sounds nice hearing it", he said of fans calling Bella his wife. "Because when she says, 'I'm with you because I love you, here's proof that I would still like to be here, here's proof.' it was such a cold thing that turned into, for me, one of the biggest emotional hurdles". "But we work every day on us". "Love is beautiful, but we've had to come to the realization after being together for five years that love is not easy", he said. "I do know that we'll have a attractive future collectively as a result of I really like the best way that sounds".