By Michael Ausiello
June 22, 2010 at 06:51 PM EDT

Image Credit: Cliff Lipson/ShowtimeTwo familiar faces will sprout up on the new season of Weeds.

Jennifer Jason Leigh is set to reprise her role as Nancy’s older sister, Jill, in one episode, while Alanis Morissette is returning for two episodes as Nancy’s baby doc (and girlfriend to Andy).

Weeds‘ sixth season, which premieres Aug. 16, finds Nancy & Co. on the run after Shane whacked Pilar with a croquet mallet.

Other upcoming guest stars include Linda Hamilton as a Seattle-based pot grower and, as my frenemy recently scooped, Mark-Paul Gosselaar as a love interest for Nancy.

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