James Bond star Daniel Craig has reportedly proposed to his long-term girlfriend with a platinum Cartier ring.

According to the Sun, a source claims that the latest 007 presented film producer Sutsuki Mitchell with a large diamond solitaire set in the precious white metal.

"Daniel and Satsuki are so loved-up. He asked her to marry him and she's been showing off a very beautiful Cartier ring," they added.

The pair met in 2005 on the set of The Jacket in which Craig starred alongside Keira Knightly.

Reports suggest that they will tie the knot in an intimate ceremony when the latest James Bond instalment, Quantum of Solace, is completed.

Meanwhile, another famous face who has expressed a preference for platinum is socialite and former Miss India, Queenie Dhody, who told sify.com that diamonds look better on platinum than other precious metals.