Pauline Philips, known to many as 'Dear Abby' reportedly passed away yesterday in her home at the age of 94.

A rep for Phillips told TMZ that Philips had been battling Alzheimer's disease.

Pauline's daughter, Jeanne -- who took over the "Dear Abby" column -- says ... "I have lost my mother, my mentor and my best friend."

Read more: TMZ