Adele has reportedly bought a never-seen-before portrait of Britain's Duchess Catherine.

The 'Skyfall' hitmaker is keen to expand her art collection by splashing out on a painting of the 31-year-old royal - who welcomed her son Prince George into the world last July - by Darren Coffield.

The 25-year-old singer - who has 13-month-old son Angelo - is believed to be so in love with the picture of Catherine - known as Kate Middleton before she married Prince William in 2011 - she's asked Darren to paint a portrait of her or a member of her family.

Speaking to the Daily Star newspaper, Darren said: "It's my ironic take on celebrity that made Adele come in to see my work. I did Kate Middleton and I'm sending that to her.

"She was asking whether I would take a commission to paint her or maybe someone in her family. I was actually going to do a portrait of her anyway but didn't get around to it."

However, Darren is convinced he won't create a picture of her receiving her MBE award from Prince Charles at Buckingham Palace last month.

He added: "I don't know how I'd do her, but probably not her receiving her model."