Erinn Hayes (“Rumor Has It”) has been tapped for the co-lead in NBC’s telepic “Behind the Camera: The Unauthorized Story of ‘Mork & Mindy.’ ”

She will play Pam Dawber, the actress who originated the role of Mindy in the ABC “Happy Days” spinoff.

Stanley M. Brooks’ Once Upon a Time Films is producing the backstage drama, which begins shooting this month. Pic will be directed by Neill Fearnley from David Misch’s script and co-stars Chris Diamantopoulos as Robin Williams.

Hayes, formerly Erinn Carter, has signed a talent-holding deal with Warner Bros. Television Studio, which will hold exclusive rights to her as a series regular for the 2005 pilot season.

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