Her death was announced by a rep for her family.
And she was irreverent and forever playing like a joyful unbridled child.
(Seacat played Garfields mother in the film he mentions, one of her final screen performances.)

Sandra Seacat, Andrew Garfield, Common and Michelle WilliamsGetty Images
And that truly made me see the higher purpose in the art that I do.
Since 1975, Seacat conducted her own classes and workshops in the US and Europe.
Sandra lived by seeing magic and possibility in everything, said Laura Dern.

She met the discovery of character and story with equal protectiveness, irreverence, humility and grace.
She taught us the practice of investigating healing through acting.
But more than that.
Shes been my teacher since age 17 and I had the honor of acting alongside her several times.
She is my whole heart.
She is survived by husband Thurn Hoffman, and beloved daughter (and acting teacher) Greta Seacat.
A memorial will be set in NYC and Los Angeles later in the year.