Adele has sparked marriage rumours after showing off two rings on her wedding finger.

The award-winning singer is believed to have happily posed for a photograph while attending a Robbie Williams concert in London last week. The snap, which was posted on a fan's Twitter page, sees Adele beaming as she puts her left hand on her chest - clearly revealing two diamond encrusted bands on her ring finger.

It has now been suggested the 25-year-old star has wed her fiancé Simon Konecki, the father of her eight-month-old son Angelo.

In April reports surfaced that Adele - who won an Oscar for her Skyfall theme tune in February - was planning to tie the knot in a '50s-themed ceremony this month.

"It's been one of the best years of Adele's life and to get married is the most amazing way to round it off. She's never been so in love," an insider said at the time. "She's planning a modest do at a local church in a small village near their home in Sussex. The reception will just be at their house - it's all very low-key."

Adele has been dating charity CEO Simon since 2011, and gave birth to their first child together in October last year.

The star slammed speculation she had wed Simon in August last year, when she was spotted wearing a gold band on her ring finger.

“I'm not married... Zzzzzzz (sic),” she wrote on her Twitter page.

Adele's grandmother has dismissed the latest round of wedding rumours, saying: "She has not got married."