She made her acting debut in the Telugu film industry by appearing in a cameo in Current Theega opposite Manchu Manoj and Rakul Preet Singh where she played a school teacher.In April 2015, Leone appeared in Bobby Khan's musical thriller Ek Paheli Leela, where she portrayed dual roles as Leela, a village belle and Meera, a supermodel from Milan. After a little gap, post the release of Ek Paheli Leela , she appeared in Devang Dholakia's Kuch Kuch Locha Hai was released on May 8, 2015.She essayed the role of a film star opposite Ram Kapoor, Evelyn Sharma and Navdeep Chabbra.The film emerged to be a critical and commercial failure.In May 2007, upon re-signing her contract with Vivid for another six films, Leone agreed to perform for the first time with men on camera, but exclusively with her fiancé, Matt Erikson.and shot her first movie under the new contract titled Sunny Loves Matt.and shared that she keeps her body in shape by working out as much as she can despite her busy schedule and as quoted in Men's Fitness magazine, "I try to eat very healthy – lots of vegetables, drinking my milk every day." In 2013, Leone posed for a PETA ad campaign, encouraging dog and cat owners to have their pets spayed and neutered.
Thane police's cyber cell at Ramnagar booked her for sections 292, 292A, 294 which could land her into jail, fine or both.In January 2016, she appeared in Milap Zaveri's adult comedy Mastizaade, released on January 29, 2016 where she portrayed twin sisters, Laila Lele and Lily Lele along with Tusshar Kapoor and Vir Das.The film released to mixed reviews and was an average earner.She accepted it, which resulted in Pooja Bhatt's production house, Fish Eye Network and Leone's agent discussing the movie further.After giving a hit number Pink Lips, she appeared once again in Shake That Booty opposite Mika Singh from his film Balwinder Singh Famous Ho Gaya.
Apart from her acting career she has been part of activism campaigns including the Rock 'n' Roll Los Angeles Half-Marathon to raise money for the American Cancer Society and has also posed for a People for the Ethical Treatment of Animals (PETA) ad campaign with a rescued dog, encouraging pet owners to have their cats and dogs spayed and neutered.