Brianna and Nicole were signed to developmental contracts by World Wrestling Entertainment (WWE) in June 2007 and were assigned to Florida Championship Wrestling (FCW), WWE's then-developmental territory, in Tampa, Florida. On September 15, 2007, the twins made their in-ring debut. Dubbed The Bella Twins, they defeated Nattie Neidhart and Krissy Vaine with Victoria Crawford as the special guest referee. The duo quickly started a scripted rivalry with Neidhart and Crawford, and had a series of matches against them throughout October 2007. As a part of their on-screen personas, they switched places behind the referee's back if one of them was hurt. They also occasionally competed in mixed tag team matches, teaming with male wrestlers including Kofi Kingston and Robert Anthony. They also made some non-wrestling appearances on Heath Miller's Happy Hour promo segment.