The show goes on for the Fast & Furious 7 movie even after the untimely and tragic death of Paul Walker. Even though the movie is still moving towards completion, Walker's co-stars admit that it is difficult to move on without the actor on the set.

Paul's brothers, Caleb and Cody Walker, will be filling in the gaps that Walker still had to complete in filming, and will join the cast to complete the remaining scenes.

In his interview with Ellen DeGeneres, Ludacris spoke how the group is moving on with the actor's absence as Brian O'Conner.

"It's very difficult, we're all still healing from it and there is a void when we go on set." The Rest of My Life rapper said. "It's scary how much they look like him and sound like him but it's a good thing."

It was previously reported that Cody and Caleb would be recording voice-over, while the production merges Paul Walker's voice archive to complete a few important lines. 

Jordana Brewster, who plays the role of Mia Toretto, is also gearing up to complete filming her role as the on-screen wife of Walker. The actress admits that the next FF saga, which is about brotherhood and family, will be emotional not just for her but for the whole production team.

When asked how she prepares for the role without Walker, she told Hollywood Life, "I like to revisit all the last ones and get reacquainted with Mia... It was the one that focused most intensely on Mia and Brian's relationship, so that one holds a very special place in my heart."

Fast & Furious 7 has a release date for theaters of April 10, 2015.

Watch the Ludacris interview with Ellen DeGeneres below.