Kings Of Leon bassist Jared Followill is engaged to marry his model girlfriend Martha Patterson. They started dating at the beginning of the year, and he proposed in April at his Tennessee house and presented her with a four-carat diamond ring he designed. Jared Followill and Joe Jonas both dated Twilight’s Ashley Greene and Martha Patterson. First Joe Jonas dated Ashley Greene, followed by Martha, while Jared Followill dated Ashley. Now Jared’s engaged to Martha. Too bad Joe Jonas and Ashley Greene aren’t together. They could go dutch!