Veteran actress Jennifer Jason Leigh was originally approached to play the character , but Watros ended up playing the role instead .
American actress Cynthia Watros portrays Libby in about twenty - one episodes of the series .
Veteran actress Jennifer Jason Leigh was originally approached to play the character , but actress ended up playing the role instead .
American actress Cynthia Watros portrays Libby in about twenty - one episodes of the series .