Priscilla Presley arrived with her family, including son Navarone Garibaldi, daughter Riley Keough and Lisa Marie’s ex-husband, Michael Lockwood.

It's unclear if Lisa's daughters Harper and Finley were in attendance for the public service ... or if the twins only attended the private family memorial that took place earlier this weekend.

Lisa's close friend Sarah Ferguson, Duchess of York, arrived a few minutes before the Presley family.

Austin Butler, who played Elvis in the new movie, arrived with Kaia Gerber. Austin's sister Ashley Butler is said to have joined him to pay respects as well.

Lisa's father Elvis' solemn song, "He Touched Me" played while the memorial live stream waited to begin, as well as a touching duet of Lisa and her father singing “Where No One Stands Alone.”

The memorial started with a performance of "Amazing Grace," sung by Jason Clark & the Tennessee Mass Choir.

Producer Joel Weinshanker then gave the opening remarks. He said Lisa Marie left instructions on her wishes for her memorial, and stated "don't make it sad."

During a tribute, former Mayor of Memphis AC Wharton listed off a lot of the famous children born after Lisa Marie, and spoke of Lisa as being the one that came before them all ... calling her a bright light and, "the image of a king."

Billy Corgan of The Smashing Pumpkins then performed his band's 1998 song "To Sheila."

Sarah Ferguson spoke of her friendship with Lisa, and reminisced on how they called each other "Sissy."

Alanis Morissette performed her 2021 song "Rest" in honor of Lisa.

Talent manager Jerry Schilling spoke of an 18-year-old Lisa telling him, "I need to have a meeting with you. I need a job, I know people don’t think I’m responsible, but I really am."

He says they then went to an exclusive place to have a meeting, "The Hamburger Hamlet." He and the audience chuckled.

He continued, "She became my secretary, and every time I would say that she would correct me and say “I’m your ASSISTANT,” which made the crowd laugh again.

Priscilla then read a beautiful personal poem titled, "The Old Soul," saying "... a broken heart was the doing of her death, now she is home where she always belonged, but my heart is missing her love.”

Riley Keough was listed to speak, but instead, a note she wrote, titled "A Letter to My Mama," was read on stage by her husband, Ben Smith-Petersen.

Rocker Axl Rose then performed the Guns N' Roses hit song "November Rain."

The memorial ended with a message stating donations in Lisa's memory could be made to the Elvis Presley Charitable Foundation.

The late singer's memorial service went down on the front lawn of Elvis' legendary estate in Memphis, and, as expected ... there was an impressive turnout to honor the King of Rock 'n Roll's only child.

After the service, there was a procession to Lisa's final resting place in the Meditation Garden -- an area in Graceland's backyard where several other Presley family members are buried, including her father and her son, Benjamin ... who died by suicide in 2020.

As we first reported, Elvis and Priscilla's daughter suffered a cardiac arrest while she was at home on Jan. 12. Her housekeeper found her unresponsive, and after paramedics resuscitated her, Lisa Marie was transported to a hospital. She died that evening after suffering a second cardiac arrest.

TMZ broke the story ... a smaller group gathered this weekend, prior to the public service. Sources with direct knowledge told us Lisa's 3 daughters, her mom Priscilla, and ex-husbands Danny Keough and Michael Lockwood were going to be together to mourn their loss.

We were told the ceremony would be extremely private, and those attending would be asked to sign an NDA to prevent details about the service from leaking.