Bradley Whitford is singing Mariska Hargitay's praises.
The West Wing alum, 63, is set to appear in Thursday night's episode of Law & Order: Special Victims Unit as a man suffering from dementia while also under investigation for killing his wife. Titled "King of the Moon," the episode saw Hargitay pulling double-duty as both actor and director.
"Everybody loves Mariska," Whitford exclusively tells PEOPLE, "and for a very good reason. She takes the work really seriously and just does not take herself seriously at all. I wish the fans of the show could see her working."
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