Presley Gerber has been cremated.

The 27-year-old model - son of supermodel Cindy Crawford, 60, and businessman Rande Gerber, 64 and brother of model-and-actress Kaia Gerber, 25 - died at a rehabilitation facility in Santa Monica last weekend and his remains have already been cremated at the Rose Family Funeral Home.

According to a death certificate obtained by TMZ, Presley's ashes will be kept at his parents' home in Malibu.

The outlet also reported that funeral arrangements for Presley are "underway" and the service is likely to take place within the next week in Southern California.

His official cause of death is still listed as "deferred" and pending investigation.

Speaking previously about Presley's death, the Santa Monica Police Department said officers were called to the 1000 block of Berkeley Street at about 9:35am on Sunday 20th September, following a report of a possible overdose.

Police said: "Upon arrival, officers located an adult male who was deceased."

The department added: "SMPD detectives are investigating the death as a suspected overdose. At this time, there is no indication of foul play. The investigation remains ongoing."

The Los Angeles County Department of Medical Examiner said Presley was pronounced dead by responding paramedics at 9:45am.

An examination has been completed, but officials have deferred a ruling on both the cause and manner of his death while additional testing or studies are carried out.

The medical examiner said deferred cases can take several months to determine.

Presley had spoken publicly about his struggles with addiction and mental health and had documented some of his attempts at treatment on social media.

Earlier this year he underwent ibogaine treatment at a clinic in Mexico.

In a post about the experience, Presley said: "I was absolutely terrified, and I knew I would be again if I ever had to face something like this."

He added: "I knew why I was there. I faced what I had been running from, and somewhere in all of it, I started finding my way back to myself… We shall see… Praying it's the last time I have to come back."

Kaia responded publicly to the post, writing: "That's my brother I am so damn proud."

Cindy wrote: "You are a warrior! Walked thru the fire to find yourself! So proud!"

Rande added: "I'm so proud of you and your courage. Facing what's hard takes real strength and watching you find your way back to yourself is everything. I love you so much."

Presley followed his mother and younger sister into modelling and worked with fashion houses and brands including Calvin Klein, Dolce and Gabbana and Celine.

He also appeared alongside Cindy in a Pepsi advertisement shown during the 2018 Super Bowl.

Kaia had spoken publicly about her brother's addiction struggles shortly before his death, telling Vogue about their effect on the family.

She said: "When something like that happens in a family, it kind of levels everyone."

Discussing the difference between Presley's public openness and the family's previous approach to privacy, Kaia said: "My parents for most of our lives were very, very private and didn't share anything - and now we have this absolute teacher, my brother, who says, 'I'm gonna be very human for everyone'. There's only so much you can hide from the world."

She added: "And trying to put a lid on something just makes the person feel like you're ashamed of them."