The former Hollyoaks star, 22, issued a brief statement to Loose Women on Monday (22 February) confirming the separation and explaining why she had pulled out of today's TV appearance.
"I'm really sad not to be able to come onto the show today and see all of you Loose Women," said the statement.
"Everything has changed for me over the weekend. I'm very upset and I feel taking a few days to get my head together is the best thing for me to do right now. Thank you for all the continuous support as always. Love you all lots and I'll see you soon. Stephanie."
She had been scheduled to appear on today's show with Jeremy, marking their first joint TV appearance, but Andrea McLean explained: "You may have heard over the weekend the two have appeared to call it a day on their relationship and yesterday they told the producers of the show they would no longer be joining us."
A rep for Irish model Jeremy added: "He cares really deeply for Steph however the pressure of the relationship was just too much, he really wishes it could have worked out and he wishes Steph the very best for the future."
Jez had fuelled rumours of a split when he cryptically tweeted at the weekend: "I have been the biggest mug. I'm sorry for the people who tried to warn me. But you live and learn. Onwards and upwards."
The couple met on the last series of Celebrity Big Brother and viewers watched as their friendship changed to romance, causing controversy as Stephanie was in a relationship with model Sam Reece at the time.
But once the show ended, Steph split from Sam and threw herself into the relationship with Jeremy. It all seemed to be going swimmingly: they declared themselves boyfriend and girlfriend, Jezza bought her a diamond ring, they met each other's families and even posed for a glossy 'loved up' magazine photoshoot together.
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