Rumer Willis is becoming a 'Workaholic' ... sort of.

EW reports that the actress daughter of Bruce Willis and Demi Moore is set to guest star on the next episode of the Comedy Central series as a drug dealer who works in a tattoo parlor. Willis' character sells marijuana to the show's main characters Adam (Adam Devine), Ders (Anders Holm) and Blake (Blake Anderson) when they cut ties with their regular hookup.

Willis' previous TV credits include "90210," "CSI: NY" and more.

In more casting news ...

Catherine Tate is headed back to "The Office" as a series regular. The "Doctor Who" actress will return to the NBC sitcom as "boss lady" Nellie Bertram. [TVLine]

Katia Winter lands a role on "Dexter."
The Swedish actress is set to play a Russian stripper who works at a Miami club in Season 7 of the Showtime thriller. [THR]

Vanessa Redgrave will play a supreme court justice on "Political Animals." Redgrave is set to play Diane Nash, a lesbian supreme court justice who is a friend and mentor to Sigourney Weaver's character on the USA political drama. [Deadline.com]

"Suits" lands two new guest stars. "Law & Order: SVU" vet Diane Neal is set to play legal eagle Allison Holt, while Erinn Hayes will appear as a "woman from Harvey's past."

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