While it will be Jennifer's first time for motherhood, semi-pro boxer Robbie has eight-year-old twin daughters Chloe and Sophie from a previous relationship.
She has said that she is adamant she doesn't want to know the baby's sex until it is born and is hoping to have a water birth.
The couple started dating in April 2008 and got engaged during a holiday in the Maldives last October.
In an interview with OK! magazine, Jennifer admitted she's had a relatively smooth pregnancy so far and the only cravings she had is for cola.
Yummy mummy-to-be Jennifer Ellison looks truly SWELL in her itsy-bitsy bikini.
She proudly showed off her generous boobs and bump in the stripy blue and red swimwear while on holiday with fiance Robbie Tickle.
The gorgeous first-time mum could hardly take her hands off her bare tummy - and Robbie could hardly keep his hands off her.
The loved-up pair, whose baby is due in January, relaxed by a pool in Tenerife in the Canary islands last week.
Former Brookside star and Hell's Kitchen winner Jen, 26, sipped orange juice before joining Robbie for a playful splash-about.
An onlooker said: "They looked so happy and well. Robbie kept rubbing Jennifer's bump. He looked like a proud dad already. This is going to be one cherished baby."
Blonde Jen got engaged to the semi-pro boxer, 30, last October following her rocky seven-year relationship with businessman Tony Richardson.
Pals say Robbie, who has eight-year-old twin girls from a previous relationship, is itching to make Jen Mrs Tickle next year.