Majandra Delfino is moving from "Roswell" to "The Farm." The "Roswell" veteran will play Dwight Schrute's younger sister in "The Office" spinoff in the works at NBC.

According to EW, Delfino, whose other TV credits include "Men of a Certain Age" and "State of Georgia," will play Fannie Schrute, Dwight's (Rainn Wilson) younger sister. Fannie previously took off from the Schrute farm and headed for the big city life in Boston. TVLine reports Blake Garrett will play her son. The two characters will appear in an episode of "The Office" that will serve as a backdoor pilot for "The Farm."

In other casting news ...

"Lost" veteran Jeff Fahey will reunite with Elizabeth Mitchell on "Revolution."
Fahey will appear in an early episode of the series as a character named Hutch. [TVLine]

Maclcolm McDowell is heading to Greendale.
McDowell will appear in two episodes of "Community" as Professor Cornwallis, a history teacher. [THR]

"Pan Am" veteran Michael Mosley has joined "Last Resort."
Mosley will recur as Chief Engineer Anders. [TV Guide]

Kelly Rowland is heading to TV.
The former "Destiny's Child" member will headline a BET pilot about a relationship blogger. [THR]