Lady Gaga and beau Taylor Kinney have sparked speculation that they may have tied the knot in secret.

The rumour mill was forced into action after Kinney was snapped wearing what appeared to be a wedding band on his ring finger.

Bush went on to reference Taylor's ring in the caption for the snap with the hashtags #ThatsHisPersonalRing #NotForTheShow.

She wrote: "I’m REALLY excited to be on @nbcchicagofire tonight! Just about as excited as I was to see my buddy #TaylorKinney at our press day yesterday.

"Bear hugs are the best hugs. #ChicagoFire #ChicagoPD #ThatsHisPersonalRing #NotForTheShow #EveryoneCalmDown #LindsayAndSeverideArentMarried."

The news comes after Lady G and her mum were seen wedding dress shopping in July!

Taylor and Mother Monster are yet to comment on the reports!