Jennifer Jason Leigh high on 'Weeds' role

Actress will play Mary-Louise Parker's estranged sister

Meet Nancy's sister.

In her biggest TV commitment, Jennifer Jason Leigh has been tapped to recur on Showtime's comedy series "Weeds," playing Mary-Louise Parker's estranged older sister.

Leigh is set to appear in at least two episodes of the Lionsgate TV-produced series, which was picked up last year for Seasons 5 and 6.

As Nancy (Parker) finds herself and her family in harm's way, she sends her brother-in-law, Andy (Justin Kirk), to takeher son, Shane (Alexander Gould), to live with her estranged older sister, Jill (Leigh).

But when Jill gets fed up with her own suburban family, she finds her way back into Nancy's life -- jealous, frustrated and intent on finally hashing things out with her little sister.

The fifth season of "Weeds" premieres in June.

Leigh, who will co-star opposite Ben Stiller in Noah Baumbach's feature "Greenberg," is repped by UTA and Untitled.