Kylie was wearing a huge diamond ring on her engagement finger as the couple enjoyed a date night at London's Chiltern Firehouse on Thursday night.
The singer teamed distressed jeans with a smart jacket and wide brimmed hat, which matched her man's, but the most noticeable accessory was her enormous ring.
The square-cut gem was hard to miss as Kylie led the way after the date night.
The singer and her boyfriend recently returned from a romantic two-week skiing trip to Geneva , with Josh thought to have proposed during the festive break.
A source has told The Sun: 'The couple recently spent the whole festive period skiing and hired a lodge for friends and family. It would have made a very romantic place for a proposal.
'Joshua recently told pals that he was ready to propose after finding the woman of his dreams and had planned the whole trip so no-one is shocked to see Kylie return back to London with a ring on her finger.'
Kylie told Desert Island Discs host Kirsty Young in a recent interview she now realises there is more to life than fame and fortune after meeting Joshua, and hopes to fulfill her dream of starting a family.
Congrats to her, hopefully she starts a beautiful family and finds the inspiration to make a more deep and different album, instead of the disco dolly bimbo route she has been following for 15 years.
