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.
who played grace's younger sister on will and grace
Sara Rue