According to the Daily Mail, Doherty has purchased an enormous vintage-style diamond engagement ring for his love.
The two have been spotted together around London, and friends of the model have revealed that the Babyshambles singer gave the ring to Moss last week.
A source said, "Even when she was supposed to be with the comedian Russell Brand she was still secretly seeing Pete. She may be off the cocaine but Pete is like an addiction that she can’t cure."