The February-slated episode will center on a wunderkind who creates a successful website. His story is, naturally, created into a film, which prompts him to sue the studio for defamation.
Abraham, the 71-year-old actor who won an Oscar for his performance in 1984's Amadeus, will play Burl, the head attorney representing the studio.
Wilson, 54, who has starred in such films as Sleepless in Seattle, It's Complicated and Old Dogs, will play Viola, a bright lawyer and old friend of Diana (Christine Baranski), who she turns to for help with a case.
Entertainment Weekly first reported the news.