A shocked neighbour alerted emergency services after finding an elderly couple lying motionless in their Gold Coast house.
Police were called to a house on Gerona Circuit in Varsity Lakes around 1.30pm Tuesday for a welfare check.
They found the woman dead at the scene.
Her partner was rushed to Gold Coast University Hospital.
Both the elderly man and woman are in their 80s.
A crime scene has been established at the house.
Queensland Police confirmed to 7NEWS.com.au the sudden death is being investigated.
This is a developing story.