Mark McGowan will step down as Western Australia's Premier and the Member for Rockingham.
Mr McGowan made the announcement during a press conference held a short time ago.
“The truth is, I’m tired, extremely tired. In fact, I’m exhausted,” McGowan said.
"I just don't have the energy or drive to continue in the role as Premier."
He was elected Premier in 2017 and has been the Member for Rockingham since 1996.
Mr McGowan will officially leave Parliament at the end of the week.
Possible contenders for the top job include Deputy Premier Roger Cook and Health Minister Amber-Jade Sanderson.
Elderly traffic warden seriously injured after being hit by truck in South West
Baldivis, Secret Harbour, Bunbury daycare centres to close
Community invited to free picnic event to celebrate completion of Mandurah Estuary Bridge
Free flu vaccines now on offer to Western Australians
Albanese announces $1.1 billion in road upgrades for Kwinana's Westport development
Drivers escape injury after head-on crash south of Perth
Whale carcass attracts sharks close to shore off Dawesville
Digital drivers' licences to be introduced in WA
Mandurah FIFO worker wins $250k