From NetFlix:

Daniel Day-Lewis won an Oscar for his portrayal of Irish writer
Christy Brown, who was born with cerebral palsy. Misdiagnosed
as mentally disabled for the first 10 years of his life, Brown
learned to write using his left foot, the only body part he
could control. The story unfolds in flashbacks, with Hugh O’Conor
as the young Christy equaling Day-Lewis’s performance as the adult.

“My Left Foot” is one of those classics that you should see at least once
before you die. Somehow Daniel Day-Lewis never seems to age. To me he looks practically the same in each of his films. Not only his performance but also that of the young Christy and Christy’s mother are phenomenal. I had seen this film years ago. It is ageless and I enjoyed it probably more the second time. Do not miss this movie!