Despite the controversy surrounding the relationship - Simon was close with Lauren's ex husband Andrew while the pair were still together - the couple now seem to be happy to flaunt their romance.
The pair spent time in the French Riviera last week and have now flown in to London where Simon has been introducing the mum-to-be to his famous friends.
The couple had dinner with Louis Walsh and a couple of friends last night and happily posed for photographers as they left the restaurant.
Simon wasn’t afraid to show off his pregnant lover while they dined at the Scalini Italian Restaurant in Chelsea. Lauren showed off her small baby bump in a dress and white-heeled sandals. The pair put on a show of affection, kissing in front of photographers when leaving the Italian restaurant.
And while Lauren is assumed to have quit her smoking habit during her pregnancy, boyfriend Simon Cowell showed no sign of kicking his habit in support of his girl. The star clung on to his menthol cigarettes all night!
But that wasn’t the only time the couple chose to be public with their affection. The pair lunched at chain restaurant Café Rouge, and decided to sit on an outdoor table. The pair sat opposite each other and held hands from time to time seemingly unaware of the attention they were causing among fellow diners.
Cowell looked to be in a cheerful mood and even posed for photographs with members of the public. They looked relaxed after their trip to St Tropez and enjoyed a trip to Harrods during the day - we can only imagine what treats are in store for little baby Cowell.