The Apprentice runner-up and Celebrity Big Brother star, 27, announced the fabulous news on Friday night (10 October) with a happy tweet and a picture of the engagement ring.
And there was certainly no missing her new piece of jewellery!
Alongside a photo of the sparkling ring on her (perfectly manicured) finger, Luisa wrote a tweet that expressed exactly how she was feeling about accepting her boyfriend's proposal.
She said: "Feeling like the luckiest girl in the world."
And, as if the ring wasn't grand enough, her boyf proposed at possibly one of the most romantic places on earth - Paris' Eiffel Tower!
As messages of congratulations flooded in, Luisa posted another picture of the stunning ring - this time safely back in its box.
She wrote: "Thanks for all your lovely messages of congratulations on my engagement. Loving my @Boodles Ashoka cut ring."
We have to admit, we're just a bit jealous!
Luisa's fellow Apprentice finalist Dr Leah Cotton, who went on to win, was one of the first to send a message of glee.
Leah, who has remained good friends with Luisa since the show, gushed: "YAY! Huge congrats & much luv to u both."
And Luisa responded with the promise of an important role on the big day, saying: "Thanks bridesmaid."
Gorgeous baking guru Luisa has been dating her businessman boyfriend, now fiancé, since earlier this year but has vowed to keep his identity secret.
Feeling like the luckiest girl in the world pic.twitter.com/1O9d7gJlx5— Luisa Zissman (@TheLuluLife) October 10, 2014
Luisa was previously married to Totally Fitness co-founder Oliver Zissman, but their divorce was finalised over the summer.
The couple have a daughter named Dixie, who was born in 2010.
A huge congratulations to you Luisa!
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Check out the other celebrities who got engaged in 2014:
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