Ronan Farrow is fondly remembering his late brother.
Mia Farrow's son shared a sweet tribute to his younger sibling, Thaddeus Farrow -- who died last week at age 27 -- writing, "Rest in peace, brother. I never knew anyone stronger, or who overcame more."
MORE: Mia Farrow's Son Thaddeus Dies at 27
Thaddeus, who was a paraplegic due to polio, was pronounced dead at Danbury Hospital in Connecticut after law enforcement found him with life-threatening injuries in his car.
According to the Office of the Chief Medical Examiner in Connecticut, Thaddeus died of a gunshot wound to the torso. His death has been ruled a suicide.
"We're devastated by the loss of Thaddeus, our beloved son and brother," Mia tweeted last week, linking to the American Foundation for Suicide Prevention. "He was a wonderful, courageous person who overcame so much hardship in his short life. We miss him. Thank you for the outpouring of condolences and words of kindness."
WATCH: Mia Farrow Speaks Out Following Son Thaddeus’ Suicide: 'We're Devastated'
Thaddeus was adopted by Mia from Calcutta, India, in 1994, and was one of 10 children the 71-year-old actress has adopted.
If you or someone you know needs help, please call the National Suicide Prevention Lifeline at 1-800-273-TALK (8255).