100,000 fans lined the streets of the 74 year-old's hometown to pay their respects
Muhammad Ali's widow paid tribute to her husband at his funeral last night.
A service for the boxing legend was being held in his hometown of Louisville in Kentucky.
Lonnie Ali took to the stage of a packed sports stadium as guests chanted 'Ali Ali'.
She thanked the world for "heartfelt expressions of love" since the boxing legend's death last week.
Two of his children also paid tribute.
Speaking at the service, former US president Bill Clinton described Muhammad Ali as a man who "decided very young to write his own life story".
He said "before fate and time could work their will on him, he decided that he would not ever be dis-empowered".
Billy Crystal also paid his respects to the 74 year-old, likening Ali's uniqueness to that of Mozart and Picasso.
The actor and comedian said Ali became a "silent messenger of peace who taught us that life is best when you build bridges between people, not walls".
During his speech he also did an impression of 'The Greatest', and received big laughs from the guests.
Tens of thousands of fans lined the streets of the 74 year-old's hometown, paying their respects and cheering as his coffin was driven to the service.
Muhammad Ali, who had Parkinson's disease, died last week.