US President Donald Trump is set to speak at slain right-wing political commentator Charlie Kirk's memorial service this weekend.

The event is being held at a stadium in the US state of Arizona, with security restrictions set to be tight.

Here's what we know about the event.

When is Charlie Kirk's memorial service?

His organisation Turning Point USA has planned a public event called "remembering Charlie Kirk", which will be held at 11am on Sunday, local time.

That's 4am AEST on Monday.

US broadcaster Fox is referring to the event as a funeral, while other outlets are describing it as a memorial service.

It's unclear whether Mr Kirk's family is planning a private funeral service or burial, however Mr Kirk's wife Erika Kirk will be speaking at the weekend's service.

Mr Kirk's body w

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