A big fat wedding ring from Martin Lawrence

Gearing up for his third marriage, Martin Lawrence spent half a million dollars on the engagement ring that he got for fiancé Roberta Moradfar! Martin popped the question on Friday, soon after the ring was delivered to his home.  Sources close to the couple told TMZ.com that the actor worked for months with a high-end jewellery store to create the custom 5 carat emerald cut engagement ring. He also added another carat for the band which has the initials of Martin and Roberta spelt out in diamonds.