Mike Tyson and Will Smith were among the early arrivals for Muhammad Ali's memorial service -- and served as pallbearers as the procession through Louisville started.
The 19 mile journey through Ali's hometown began Friday morning after Tyson, Smith, Lennox Lewis and several of Ali's family members carried his coffin to the waiting hearse.
The procession will end up at Yum! Center arena where Bill Clinton will deliver the eulogy for Ali at the memorial service.
Kareem Abdul-Jabbar, who called Ali his mentor, is also in Louisville.
The memorial service is scheduled to begin at 10 AM PT ... and TMZ will be live streaming.
Waiting for your permission to load the comments.