"It was definitely very difficult. We're all still healing from it. There's a void when we go to set, but we understand we have to carry on his legacy and this movie is going to be very special... And it's scary how much his brothers look like him and sound like him, but it's definitely a good thing." Rapper/actor Ludacris misses his late Fast & Furious co-star Paul Walker while filming the seventh instalment of the franchise. Walker's brothers are serving as stand-ins for the late actor's unfinished scenes.