Celebrities, politicians and fans of Muhammad Ali have come together in the boxing legend's hometown of Louisville for a two-day farewell to the four-time world heavyweight champion, known as "The Greatest," who died on June 3 at age 74.

A well-wisher holding a banner touches the hearse carrying the remains of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, June 10, 2016.

More photos: Life magazine's rare photos of Muhammad Ali

Muhammad Ali 1942-2016

Look back: Thrilla in Manilla

Sen. Orrin Hatch, R-Utah speaks during Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Spectators cheer after Rabbi Michael Lerner's political speech during Muhammad Ali's memorial service, Friday, June 10, 2016 in Louisville.

Rabbi Michael Lerner speaks during Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Sen. Orrin Hatch, R-Utah speaks during Muhammad Ali's memorial interfaith service, Friday, June 10, 2016, in Louisville.

Hatch described his special bond with Ali and related the story of what Ali told him about his Parkinson's disease, "God gave me this condition to remind me I am human and only humans are the greatest."

Imam Zaid Shakir introduces speakers during Muhammad Ali's memorial interfaith service, Friday, June 10, 2016, in Louisville.

Comedian Billy Crystal speaks at a memorial service for Muhammad Ali in Louisville, Kentucky, June 10, 2016.

Former President Bill Clinton speaks at a memorial service for Muhammad Ali in Louisville, Kentucky, June 10, 2016.

Former President Bill Clinton sits with comedian Billy Crystal along with other guests during Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Actor Will Smith, one of Muhammad Ali's pallbearers, waits for the Ali family to arrive at the Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Lonnie Ali, widow of Muhammad Ali, leaves the funeral home to begin a procession through his hometown of Louisville, June 10, 2016.

Muhammad Ali's daughter Maryum arrives for his memorial service, Friday, June 10, 2016, in Louisville.

Former President of Afghanistan Hamid Karzai, right, shakes hands with an unidentified guest before Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Spike Lee, left, speaks to other guests as they arrive for Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

The rapper Common hugs an unidentified woman before a memorial service for the late boxer Muhammad Ali in Louisville, June 10, 2016.

Soccer player David Beckham, left, arrives for Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Former Governor of California Arnold Schwarzenegger, center, arrives for Muhammad Ali's memorial service, Friday, June 10, 2016, in Louisville.

Musician and actor Kris Kristofferson shakes hands with the Rev Jesse Jackson (not seen) at a memorial service for the late boxer Muhammad Ali in Louisville, June 10, 2016.

Rev. Jesse Jackson arrives at a memorial service for boxing legend Muhammad Ali at the KFC Yum! Center on June 10, 2016 in Louisville.

Musician Yusuf Islam, commonly known by his formerly stage name Cat Stevens (C), arrives at a memorial service for the late boxer Muhammad Ali n Louisville, June 10, 2016.

Pallbearer Mike Tyson leaves the funeral home to attend Muhammad Ali's memorial in Louisville, June 10, 2016.

Hana Ali, daughter of Muhammad Ali, is thrown flowers as she rides in her father's funeral procession while it enters Cave Hill Cemetery, Friday, June 10, 2016, in Louisville.

A hearse carrying the body of the late Muhammad Ali enters Cave Hill Cemetery in Louisville, Kentucky, June 10, 2016.

Mourners wait for the hearse carrying the body of the late Muhammad Ali outside the main gate to Cave Hill Cemetery in Louisville, June 10, 2016.

A girl throws flowers at the hearse carrying the body of the late boxing champion Muhammad Ali during his funeral procession through Louisville, June 10, 2016.

A mourner holds an American flag as the funeral procession for Muhammad Ali makes its way down Muhammad Ali Boulevard in Louisville, Friday, June 10, 2016.

Akera Price-King, 9, carries a sign saluting Muhammad Ali on the street in front of Ali's boyhood home (pink house) on Friday, June 10, 2016 in Louisville.

Ali's funeral procession is scheduled to pass by the house later in the day.

People stand as the hearse carrying the remains of late boxing champion Muhammad Ali passes Ali's childhood home during the funeral in Louisville, June 10, 2016.

People reach out an touch a hearse with the remains of boxing legend Muhammad Ali passes on the way to Cave Hill Cemetery June 10, 2016 in Louisville.

Thousands of people from near and far were expected to line the streets of Muhammad Ali's hometown Louisville on Friday to say goodbye to the boxing legend and civil rights hero, who mesmerized the world with his dazzling skills.

A man throws a rose over the hearse carrying the remains of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, June 10, 2016.

A police-escorted hearse carrying the body of Muhammad Ali passes by his childhood home on June 10, 2016 in Louisville.

The funeral possession winded through Louisville, preceding a memorial service and giving the public an opportunity to honor the four-time world heavyweight boxing champion, who died on June 3 at age 74.

Actor Will Smith greets the public while riding in the funeral procession of Muhammad Ali on June 10, 2016 in Louisville.

Smith played the boxing legend in the film "Ali" in 2001 and was a pall-bearer at Ali's funeral.

People participate in the funeral procession for three-time heavyweight boxing champion Mohammad Ali outside Ali's childhood home in Louisville, June 10, 2016.

A hearse carrying the body of the late Muhammad Ali drives down Muhammad Ali Boulevard to Cave Hill Cemetery in Louisville, Kentucky, June 10, 2016.

Crowds line the route and cheer as the procession passes led by the hearse carrying the body of Muhammad Ali, Friday, June 10, 2016, in Louisville.

Terry Wilson (left), and Dwight Stokes, both of Indianapolis, carry murals in front of the boyhood home of Muhammad Ali on Grand Avenue before the the passing of the funeral processional.

The hearse carrying the remains of Muhammad Ali leaves the A D Porter & Sons funeral home during the funeral procession for the three-time heavyweight boxing champion in Louisville, Kentucky, June 10, 2016.

Maggie Cassaro, of Louisville, spreads roses along the entrance way to Cave Hill Cemetery as police stand guard before the arrival of Muhammad Ali's funeral procession, Friday, June 10, 2016, in Louisville.

Muhammad Ali will be laid to rest Friday, the culmination of a two-day farewell for the beloved boxing legend who electrified crowds the world over.

People pose for photos outside the childhood home of the late boxing champion Muhammad Ali in Louisville, June 9, 2016.

Jamani Booker, 6, (R) and Ramiya Taylor, 6, get lanyards from their grandmother showing an image of Muhammad Ali during the funeral procession for the three-time heavyweight boxing champion in Louisville, June 10, 2016.

A sign wishing Muhammad Ali well is seen along a burial procession route for the boxing legend June 10, 2016 in Louisville, Kentucky.

Muhammad Ali will be laid to rest Friday, the culmination of a two-day farewell for the beloved boxing legend and civil rights hero who electrified crowds the world over.

Boxing gloves hang on a historical marker outside Muhammad Ali's childhood home as mourners gather for the funeral procession for the three-time heavyweight boxing champion in Louisville, June 10, 2016.

Muhammad Ali's casket arrives at Freedom Hall for his Jenazah, a traditional Islamic Muslim service, Thursday, June 9, 2016 in Louisville.

Worshipers and well-wishers take photographs as the casket with the body of the late boxing champion Muhammad Ali is brought for his jenazah, an Islamic funeral prayer, in Louisville, Kentucky, June 9, 2016.

Muhammad Ali's wife Lonnie, center, attends Muhammad Ali's Jenazah, a traditional Islamic Muslim service, in Freedom Hall, Thursday, June 9, 2016, in Louisville.

Laila Ali (R), daughter of boxing legend Muhammad Ali, sits with her family during an Islamic Janazah service for her father at Freedom Hall ion June 9, 2016 in Louisville.

Veronica Porche-Ali, Muhammad Ali's former wife, attends his Jenazah, a traditional Islamic Muslim service, in Freedom Hall, Thursday, June 9, 2016, in Louisville.

Promoter Don King stands next to former boxing champion Sugar Ray Leonard during Muhammad Ali's Jenazah, a traditional Islamic Muslim service, in Freedom Hall, June 9, 2016, in Louisville.

Sugar Ray Leonard (C) talks with people taking part the jenazah service, an islamic prayer service for the late Muhammad Ali at Freedom Hall in Louisville, June 9, 2016.

Turkey's President Recep Tayyip Erdogan attends Muhammad Ali's Jenazah, a traditional Islamic Muslim service, in Freedom Hall, Thursday, June 9, 2016, in Louisville.

American civil rights activist Jesse Jackson speaks to members of the media before Muhammad Ali's Jenazah, a traditional Islamic Muslim service, in Freedom Hall, Thursday, June 9, 2016, in Louisville.

Nahed Ahmed Zeead, 51, of Iraq, takes part in the jenazah, an Islamic funeral prayer, for the late boxing champion Muhammad Ali in Louisville, June 9, 2016.

Ali Aldhefary arrives to take part in the jenazah, an Islamic funeral prayer, for the late boxing champion Muhammad Ali in Louisville, June 9, 2016.

People arrive for a Jenazah service to celebrate the life of boxing legend Muhammad Ali at Freedom Hall June 9, 2016 in Louisville, Kentucky.

Thousands of people are expected to attend the service for Ali on Thursday, the start of two days of poignant ceremonies honoring the late boxing legend.

A pedestrian passes over a foot bridge decorated with a memorial banner to Muhammad Ali Wednesday, June 8, 2016, in Louisville, Ky.

Ali's memorial service Friday looms as one of the most historic events in Louisville's history.

People gather outside the Muhammad Ali center near a makeshift memorial for the legendary boxer June 8, 2016 in Louisville.

All of the roughly 15,000 tickets for the June 10th public memorial service in Louisville honoring boxing legend Muhammad Ali, the city's most famous son, have been distributed, organizers said.

Momentos, including a pair of boxing gloves, lie at a makeshift memorial for Muhammad Ali outside the Muhammad Ali Center on June 8, 2016 in Louisville.

A portrait of Muhammad Ali, under a crescent moon, stands at a memorial outside the Muhammad Ali Center on June 8, 2016 in Louisville, Kentucky, Ali's hometown.

A woman walks past quotes by late boxing champion Muhammad Ali that have been drawn on the sidewalk in Louisville, Kentucky, June 8, 2016.

Barbara Hillman, of Louisville, carries a Muhammad Ali doll after receiving tickets to Ali's memorial service Friday at the KFC Yum! Center Wednesday, June 8, 2016, in Louisville.

A woman cheers after receiving free tickets to Muhammad Ali's memorial service Friday at the KFC Yum! Center Wednesday, June 8, 2016, in Louisville.

Ali's memorial service Friday looms as one of the most historic events in Louisville's history.

A quote from Muhammad Ali adorns a makeshift memorial at the Muhammad Ali Center on June 8, 2016 in Louisville.

A well wisher writes on a banner while paying tribute to the late boxing champion Muhammad Ali during the I Am Ali Festival at the Kentucky Center of the Performing Arts in Louisville, June 8, 2016.

Roses stand at a makeshift memorial for Muhammad Ali outside the Muhammad Ali Center on June 8, 2016 in Louisville.

Fans of the late Muhammad Ali sign a large banner at the I AM ALI festival to celebrate his life at the Kentucky Center of the Performing Arts in Louisville, Kentucky, June 8, 2016.