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Rex Features
Cavanagh, who played Dan Dorian in the ABC comedy series, will star alongside Justin Timberlake, Dan Aykroyd and Anna Faris in the adaptation of the popular children's cartoon.
He will play the male lead Ranger Smith, who is the romantic interest for a documentary filmmaker (Faris), who comes to Jellystone Park to shoot a film.
Ghostbusters actor Aykroyd will voice the titular bear, while Timberlake is signed up to play Yogi's best friend Boo Boo.
Eric Brevig (Journey To The Centre Of The Earth) will direct the film, which has begun shooting in New Zealand.
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