The Pitch Perfect star, who costars in The Voices with Blake's hubby Ryan Reynolds, couldn't stop gushing over Blake while she promoted the thriller flick at Sundance.
"She's just heaven! She's so kind and so stylish," Kendrick told E! News, also giving props to the starlet for her beauty and fashion choices.
"Every time I would see her wear a new nail polish color, I'd be like, 'I'm going to wear green nail polish like her!' But then, damn, it doesn't make me look like Blake Lively. So close!" she said.
The brunette beauty also had nothing but sweet things to say about Ryan, adding, "He's an absolute dream to work with. He's so talented and he's playing a really odd character."
The film, which is centered on an accidental murderer who loses his grip on reality and starts talking to and getting advice from his pets.
The Voices debuted at the famed indie film festival Jan. 19.
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Gallery | Blake Lively - Back in Action