Nearly a year after the disappearance and death Gabby Petito, Lifetime is unveiling an original movie based on the case. The network dropped the first trailer for the film – called "The Gabby Petito Story" – on Thursday. Skyler Samuels portrays the titular travel blogger, while Evan Hall plays Gabby's fiancé and killer Brian Laundrie. The trailer depicts Gabby and Brian's travels across the country, and shares a fictionalized look at what could have happened on the road. "The Gabby Petito Story" premieres Oct. 1 at 8/7c on Lifetime.