The Brazilian actor opened up to Flicks and Bits about shooting the action film, revealing that Schwarzenegger quickly put him at ease once work commenced.
(Pictured above: Rodrigo Santoro at film premiere)
"I'm not going to lie to you, at first it was a bit intimidating," Santoro recalled. "But then when you step on set and Arnold gives you that look, and you know you can do it. His confidence feeds you, it's very inspiring."
Santoro also joked that he never dreamed that he would have the opportunity to share the screen with a cinema icon like Schwarzenegger.
"I think the 12-year-old that lives inside me screamed, 'What! You're doing a movie with Arnold?! Really?! It's Conan man, it's friggin' Terminator! That's awesome man, we're really doing it'," he teased.
He added of Schwarzenegger: "Arnold, he's an institution. And he said it, 'I'll be back'. He is back, definitely. And I loved that combination of Jee-woon Kim and Arnold, it's an unexpected combination. For me it was a no-brainer to do this movie."
Schwarzenegger recently expressed his pride in The Last Stand, a film which he says shows his growth as an actor.
The Last Stand is now playing in the US and opens on January 25 in the UK. Watch a trailer below: