Stephen Collins, Dee Wallace to Appear on The Office

Ready to see who brought the Nard Dog into this world?
7th Heaven patriarch Stephen Collins and Dee Wallace (E.T.) will guest-star on The Office as Andy's parents, Entertainment Weekly reports.

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"Doing 'The Office' this week," Collins tweeted Tuesday. "Ridiculously fun & talented group, including @Rainnwilson who I worked w/in his 1st job in '89 in the Park."Collins most recently starred on No Ordinary Family and recurred on Private Practice. Wallace guest-starred on Detroit 1-8-7 and Law & Order: LA last year.The Office returns Thursday, Sept. 22 at 9/8c on NBC. Collins and Wallace's episode will air in October.