Michael McKean and Megan Mullally are dating ... on 'Happy Endings.'
According to TVLine, McKean has been cast as Dave's dad. When he comes to town, he'll be joined by Penny's Mom, Dana, played by Megan Mullally. Could Dave and Penny become step-siblings!?
The episode is set to air in early 2012. This is Mullally's second guest appearance on the series. Her character made her debut in an early October episode. Dana and Penny performed a mother-daughter duet to 'Torn.'
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