The Pirates of the Caribbean: On Stranger Tides actor, who plays Prince Charmant in the fairytale re-telling, told Digital Spy that Stewart will relish the challenge of playing a character so different to her Twilight alter-ego Bella Swan.
"I've only done one tiny scene with Kristen so far, but I have every hope in her," Claflin said. "I truly believe and trust in her and I'm pretty sure she'll do an absolutely diamond job of it.
"I'm pretty sure she's excited about the challenge."
Stewart and Claflin's Snow White project, also starring Charlize Theron as the Evil Queen and Chris Hemsworth as The Hunstman, will be released next year shortly after Tarsem Singh's rivalSnow White movie led by Lily Collins and Julia Roberts.
Clafin insisted that he isn't concerned about the other Snow Whitemovie, adding that two similar stories can exist side-by-side.
He explained: "They're two completely different projects altogether. As much as they've obviously got the same premise, you could say that about so many things. The Hangover and The Inbetweeners, for example, are different films but basically about boys going out and getting drunk.
"The beautiful thing is I think both directors have very different ideas of where they're going with it. I have a friend whose in the other one so it's nice that we keep each other updated. I'm excited to see that one as much as I'm excited to see the one I'm in."
Claflin's Pirates of the Caribbean: On Stranger Tides is out on Blu-ray and DVD now. Snow White and the Huntsman is scheduled to open in cinemas on June 1, 2012.
Source: DigitalSpy via @Vonch