Sean Astin / Facebook 1 / 8
Sean Astin / Facebook 1 / 8

Shortly after the news was made public that his famous mother Patty Duke had passed, Sean Astin took to social media to post a heartwarming tribute -- and announced that he's launching a mental health initiative in her honor.

"I love you mom," he wrote alongside a photo of his mother holding him as a baby. The message also included the statement that the family released to announce the passing.

Along with image, Sean posted the words, "Her work endures," along with a link to the Patty Duke Mental Health Project.

"My mother's life touched tens of millions of people. Her ground breaking portrayal of iconic American legend Helen Keller, launched a career that would span six decades," Sean wrote of the crowd-funded project. "First on broadway and then on the silver screen, Patty Duke's characterization of the extraordinary development of the blind/deaf child brought global attention to the plight of people living with those challenges.

"The nature of this kind of illuminating and compassionate work become the sacred mission of her life," he continued. "She became a voice for the voiceless, a reassuring presence for the scared, the intimidated and the lost. She was a healer of many souls and a champion for so many in need."

Patty passed away on March 29 at the age of 69.

"Anna (her given name) fought for civil rights, gay rights and the rights of working actors to name just a few. Her greatest achievement was confronting her mental illness and making her story public. She crossed the Nation speaking and campaigning and lobbying for mental health. My mom took her place as a mental health advocate in the greatest tradition of noble leadership.

"Ultimately, her colossal energy and indomitable spirit charged her life and bolstered the sense of purpose and intention that defined her existence. Through countless and often agonizing struggles, she was a deeply committed and tireless WARRIOR."

The "Goonies" star continued, "Before her passing, before the suffering became too great, we talked about how the core mission of her mental health work might continue beyond her life. This initiative will fuel a multi-level approach to achieving results for those suffering with mental illness and their families and communities. Public awareness campaigns, lobbying efforts, and supporting a multitude of mental health programs big and small will be organized, prioritized and vigorously pursued."

He also, took to Twitter to beautifully share the news of his mother's passing. "This morning Anna Pearce @pattyduke_id closed her eyes & ascended to a beautiful place" he wrote.