Gabourey Sidibe, star of Lionsgate’s “Precious: Based on the Novel ‘Push’ by Sapphire,” is in talks to appear in the Showtime pilot “The C Word.”Laura Linney stars as a terminal cancer patient in the half-hour dark comedy from scribe Darlene Hunt and Sony Pictures TV. Sidibe would have a guest spot in the pilot as a teen whom Linney’s character tries to help lose both weight and the bad attitude. Pilot is set to be directed by Bill Condon. Hunt, Linney, Neal Moritz and Vivian Cannon of Original Film exec produce. Sidibe is receiving awards buzz for her title role in “Precious” as a teenage mother who’s physically and verbally abused by her own mother (Mo’Nique). Pic will be released Nov. 6.