Ludacris Opens Up About Acting Alongside Paul Walker's Brothers in 'Fast & Furious 7'

May 12, 2014 -- Paul Walker died before he could complete "Fast & Furious 7."

So, his two brothers, Caleb and Cody, stepped in to help the cast and crew finish the movie.

"It's definitely a good thing," Walker's co-star Ludacris told Ellen DeGeneres about their work. "It's scary how much they look like him and sound like him."

Vin Diesel Posts a Photo Alongside Walker's Brothers

The actor/rapper, 36, told DeGeneres that the loss of Walker, who died in a car accident last November, is still being felt on set.

"It's definitely very difficult," he said. "We're all still healing from it and there's a void when we go to set, but we understand we have to carry on his legacy."