Harry, who split from Nick earlier this year, confirmed her baby news via Twitter.
According to the Daily Star Online, Harry is five months pregnant, but it doesn't look like a reconciliation between the pair will be on the cards.
Harry responded to a follower on Tuesday night, saying: "I can be just as good a parent as a single one."
According to Mail Online, Harry also confirmed the news (via his private Twitter account), and confirmed that they are expecting a baby boy.
He tweeted: "Seeing as though it's out, it's been a whirlwind, frightening, exciting e.t.c really excited to be having a Boy. X."
Harry and Nick appeared on CBB's 16th series last summer, and the unlikely couple had viewers hooked with their romance.
Speaking about Harry in his exit interview on the show, Nick had gushed: "Sometimes opposites attached and she is endearing and beautiful and I want to keep seeing her. It will be hard but it is something I want and to happen. She made it as special as it was and without her I wouldn't have got through it."
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