Natalie, who starred on the last series of The Apprentice alongside Luisa Zissman and Leah Totton, confirmed her exciting news on Twitter last night.
Business woman Natalie and her husband Ollie Reynolds - who got married in September - have had their three month scan and she has also uploaded the picture of their unborn child on the social networking site.
Natalie tweeted: "So excited 2b able 2 let out the secret that @olliereynolds1 and me have been keeping for three months. #baby #love."
Apprentice winner Leah spent the evening with Natalie last night and added: "Nando's with the glowing @NataliePanayi, congratulations on her fab baby news xx #YummyMummy."
Some of Natalie's other fellow candidates were also quick to offer their best wishes, with Neil Clough tweeting: "Congratulations to you both :)"
Francesca MacDuff-Varley said: "Congratulations guys.... Great news babes xxx"
Natalie survived seven weeks on the BBC1 reality show and has gone on to launch her own fashion line with her sister.
Since The Apprentice, Natalie has also become good friends with former TOWIE star Lucy Mecklenburgh, who has also offered her congratulations.
The girls attended the horse racing at Sandown Park in Surrey last month and it seems Lucy had already twigged that something was up.
"Yayyyy! I'm so happy for you both! So that's why u turned down the champers at the races ;) xxx" Lucy tweeted.
Natalie replied: "Thank you babe! So happy! Yep that's why! I knew you knew ;) #womensintuition xxx"
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