Article continues below advertisementBrad Pitt's mother, Jane Etta, has passed away at age 84.The sad news was revealed by the movie star's niece Sydney, whose father is the actor's brother, Doug Pitt."My sweet Grammy, Jane Etta, we were not ready for you to go yet but knowing you are finally free to sing, dance, and paint again makes it a tad easier," her tribute began.Article continues below advertisement'She Had the Biggest Heart'Source: @pidney/instagramBrad Pitt's niece confirmed his mother, Jane Etta, has passed away"If you knew Grammy, you knew she had the biggest heart.