Riley Keough, the 21-year-old daughter of Lisa Marie Presley (and, thus, granddaughter of King Elvis) has returned to the modeling game, striking a pose in double denim for Lee's jean's new campaign.Keough has already put in her share of time on the catwalk, making her debut at Dolce & Gabbana's 2004 show (she was 14) and strutting for Victoria's Secret two years later (feels illegal).