The late fashion designer - who was found dead in an apparent suicide in her New York apartment earlier this month - was cremated after a funeral service in Los Angeles on Tuesday (25.03.14) and part of her remains will now be taken to Utah and laid to rest close to her parents.
Her brother Randall Bambrough said: ''She was cremated and I have some of her ashe.
''Some of those ashes, they will be buried near our parents here in Utah. And there will be a ceremony, date to be determined, in Utah for all family members who will have an opportunity to see their friends and others.''
Randall is unsure what the Rolling Stones frontman - who was in a relationship with L'Wren for 13 years until her death - plans to do with the rest of his sister's ashes.
He told the New York Daily News newspaper: ''They're with the Jagger family. That's all I can say.''
Though L'Wren's estranged sister Jan Shane slammed her funeral, insisting it should have taken place in Utah, and criticised Mick, 70, for taking over the plans, her brother insisted the memorial was in keeping with the designer's wishes as she wanted the 'Brown Sugar' star to take charge.
There are currently five separate teams working on 'Game of Thrones' projects at HBO.
She's a big fan of the band and this week she got to perform with them.