Theron, who has said that she and Stewart share an "effortless" friendship with Stewart, expressed her admiration for the younger star to Access Hollywood.
"I really, really love that girl. I love that girl, like, I would jump off a building for that girl," Theron said. "She's amazing, she's amazing. She's the real deal… [and] she gives really good back rubs."
The Young Adult actress went on to say that she is in awe of Stewart's talent on camera, adding: "[Kristen] is the kind of actor that I like to be around because there's nothing she'd really stop at in order to do the job.
"She's got a tremendous amount of talent and, you know, I think you can have talent, but if you don't have tenacity and moxy.,, She's badass."
Theron previously praised Stewart for her laid-back attitude, claiming that she 'doesn't give a f**k'.
Watch the trailer for Snow White and the Huntsman below: