Nasty!
I met her, she's a nasty, horrible person.
shareI've actually heard that she's a nightmare from people who have worked on projects (including "Weeds")with her. Apparently, people around the set often refer to MLP as "it." As in, "Do not make eye contact with 'it.' Do not speak directly to 'it' on the set. 'It' will freak out on you."
Of course, this is secondhand info from people who have worked with her and they may have their own motivations to badmouth her but when you hear it a few time, one has to wonder.