Eagle-eyed viewers of Frozen may have noticed a split-second cameo in the film by Rapunzel and Flynn Rider from Tangled (above). The Tangled easter egg surprised even Nathan Greno, the co-director of the film, who had to check with one of the animators on the Frozen shot to confirm the presence of his film’s characters. A fan asked Greno on Facebook and shared the exchange on their Tumblr. “I didn’t know,” Greno told the fan. “I guess I missed that when I watched the film.”

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