EXCLUSIVE: 'Star Trek Beyond' Cast Says They Feel Like They're 'Morphing Into the Original Cast'

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It's been nearly a decade since the first installment of the new generation of Star Trek movies. And, it's easy to say that over the years the cast has only gotten better with time, as ET found out on set.

"We really have grown to love each other," John Cho told ET.

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"I literally feel like we are morphing into the original cast," Karl Urban chimed in.

Cho, Urban, Chris Pine and Zachary Quinto return as Sulu, Doctor Bones McCoy, Captain James Kirk and Commander Spock in Beyond, which finds the Enterprise crew two years into their mission to deep space.

Zoe Saldana reprises her role as Lieutenant Uhura, but she wasn't able to make it to set the day of ET's visit, because one of her twins was sick. But not to worry! She could soon be receiving a helping hand from her co-star.

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"Sure, I'll baby sit," Pine told ET. "Why not? I'm not that great with kids, but I'll sing a song or, I don't know, help out."

Amid the familiar faces, Rihanna injected some new blood into the franchise with the theme song "Sledgehammer." The pop star revealed she was the perfect person to appear on the soundtrack as her history with the franchise goes way back.

"Star Trek has been a part of my life since I was a little girl," Rihanna said in a featurette for the film. "My dad really is the one who introduced me to Star Trek. It just took me one episode to fall in love with this world I thought I couldn't understand but I felt I could relate to."

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Star Trek Beyond opens July 22.