<Li> Martin Adler, Grace's father, played by Alan Arkin and Robert Klein in Season 9 . Portrayed by his family as the stereotypical Jewish patriarch, Martin shows genuine affection for Grace, although remarks he has made suggest Joyce is his favorite . He has been known to pinpoint Grace's flaws without looking up from his Kojak and Baretta reruns . </Li> <Li> Janet Adler, Grace's older sister, is played by Geena Davis and Mary McCormack in Season 9 . Janet lives in a van and designs jewelry . Her nickname for Grace is "Smudge". It is once implied that she has difficulties with her mother . In the episode "Lows in the Mid-Eighties", Will asks if Grace has another sister named Janet, to which Bobbi, Joyce, and Grace quickly answer "No!" </Li> <Li> Joyce Adler, Grace's younger sister, is played by Sara Rue . It is suggested that Grace and Joyce had a not too friendly relationship growing up, and that Joyce was formerly a binge eater . She is often hostile to Grace, but one word from Will and she tends to giggle and act girlishly; it appears that she, like Grace before her, has a crush on Will . </Li> <Li> Laila Markus, Grace and Leo's daughter, is played by Maria Thayer . Laila was conceived by Leo and Grace on an aircraft, during a period where her parents were divorced . She was going to be raised by Will and Grace, but her parents remarried shortly before her birth . She appears on screen only during the series finale . </Li>

Who played grace's younger sister on will and grace