Heading up town, the showbiz couple were spotted enjoying dinner for two at London eatery Mr Chow, after attending the Royal Variety Performance at the London Palladium.
Talk about a lavish affair!
While Simon was suited and booted in a pinstriped suit and his trademark open white shirt, Lauren looked simply stunning in an elegant black gown and diamond necklace.
And, with his gorgeous girlfriend on his arm, it's no wonder the music mogul had a smile from ear to ear!
Although Lauren looked just as smitten with her other half, as she couldn't take her eyes off the music mogul.
Before their dinner date, the pair had rubbed shoulders with Prince William and Kate Middleton at the Royal Variety Performance.
Treated to a star-studded line-up, not only did Simon and Lauren see Britain's Got Talent winners Collabro take to the stage, they also watched the likes of Demi Lovato, Ed Sheeran, Ellie Goulding and One Direction perform.
When he's not mixing with stars and royalty, proud dad Simon has been busy showing off his eight-month-old son Eric.
Posting a very cute video of Eric drumming along to One Direction on Facebook, Simon joked his baby boy is eyeing up a sixth spot in the band.
Along with the clip, Simon said: "One Direction have just hired Eric as their new drummer."
Since Lauren gave birth to Eric in February earlier this year, Simon has been taking fatherhood in stride and is often seen gushing about his son on social media.
Cute. Who knew Mr Nasty had a softer side?!
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