Los Angeles - Gwyneth Paltrow has been branded a "backstabber" by Difficult People creator Julie Klausner.
The writer-and-comedian claimed Hollywood stars "pretend" to be friends with one another, while telling a different story in private, and accused the Iron Man 3 star of being one of the worst.
She told the New York Post newspaper's Page Six column: "They pretend that they are all great friends, but the stuff that is said about people behind the scenes is really terrible.
"Well - Gwyneth Paltrow - there's many a tale to tell. All kinds of backstabbing."
Julie - who also stars in Difficult People alongside Billy Eichner as two struggling New York comics who hate everyone - didn't give any specific details about Gwyneth's alleged antics but suggested she may be different these days.
She simply said: "She's into Eastern therapy cupping now - maybe she's cupping instead of backstabbing."
The 38-year-old star has previously hit out at the 43-year-old actress on Twitter.
In March she posted: "Click here to witness the chemistry between Gwyneth Paltrow and Jimmy Fallon AKA the comedy version of ammonia and bleach!"