The 41-year-old contacted the house to announce the results of the shock live eviction but she seemed to forget what series of the Channel 5 show she was presenting.
As she spoke into her microphone to speak to this year’s contestants, she had to quickly correct herself after she began to say “Celebrity Big Brother”.
Addressing the housemates, the presenter said: “Let’s talk to the house. Celeb… Big Brother House this is Emma.”
Emma Willis cut a stylish look in a red hot jumpsuit
The Big Brother house accidentally made a slip up as she spoke to the house
And fans of the reality programme quickly noticed her mistake and took to social media to joke that they weren’t surprised Emma almost said celebrity.
One person wrote on Twitter: “It's okay @EmmaWillis I feel like it's #CBB as well with all the Z-listers in there #BBUK.”
“Slip of the tongue there @EmmaWillis? Don't worry not surprised u thought it was CBB #BBUK,” another viewer wrote.
A third added: “Emma Willis was about to say celebrity big brother house… says it all really.”
Rebecca Jane was the third evictee in Big Brother house Big Brother winners: Then and Now Wed, June 14, 2017
Big Brother: All the winners pictured then and now
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Big Brother winners then and now
Rebecca Jane was evicted in the shock eviction show
“Emma slipped up and nearly said celebrity big brother ohh Emma we love you @EmmaWillis #BBUK,” wrote one fan.
In the shock eviction show, Rebecca Jane became the third housemate to leave the Big Brother house.
But the Lancashire-born housemate insisted it should have been Joe Quaranta sat talking to Emma instead.
Big Brother continues tonight on Channel 5 at 10pm.