Olivia Wilde, 37, supported Harry Styles, 27, when he kicked off his Love On Tour on Saturday night! The actress, who has been dating the singer since at least Jan., was spotted walking into an area of the MGM Grand Garden Arena in Las Vegas, NV while wearing a stylish pantsuit that included a blazer and flared out pants. She also had her blonde locks down and wore a black face mask as she appeared to be surrounded by crew members. Check out some of the pics HERE.