Ellen DeGeneres’ chat show has been hit with a lawsuit over a joke about breasts.

A US woman is suing the producer of the show, claiming the comedian mispronounced her name to make a joke about boobs.

Real estate agent Titi Pierce alleges in the lawsuit – which was filed against Warner Bros last week – that Ellen displayed one of her real estate signs during a show which aired in America in February, and which was re-run in April.

Ellen DeGeneres on the red carpetEllen DeGeneres (Richard Shotwell/AP/PA)

It says Ellen led into the joke about Pierce’s name after showing a sign for the unrelated Nipple Convalescent Home.

The suit also says the sign included Pierce’s mobile number and that she was subjected to “ridiculing and harassing” phone calls.

The suit claims invasion of privacy, defamation and emotional distress. It seeks unspecified monetary damages.