By Heather Waugh For Dailymail. She's yet to address rumors that she's set to marry boyfriend Chris Martin. But Dakota Johnson didn't hesitate to flash the stunning rock on her wedding finger on Saturday as she enjoyed a solo drive around Malibu. The year-old actress was seen at the wheel of her Vintage Shelby GT Mustang as she stopped at a friend's house. Bride to be? Dakota Johnson went for a drive on Saturday flashing a huge emerald ring on her hand amid rumors she's engaged to Chris Martin.