Police are appealing for witnesses after a 23-year-old man was stabbed several times at a house in the Acacia Avenue area of Merthyr.
A 34-year-old man has been charged with attempted murder and is due to appear at Merthyr Magistrates Court later today.
The victim was taken to Prince Charles Hospital for treatment.
South Wales Police want anyone with information that could help them with their investigation to come forward.
More top news
Kiara Moore died at after being recovered from a silver Mini in the River Teifi in Cardigan on Monday.
Witnesses reported seeing someone eject from the aircraft with a parachute before it smashed into the ground then "burned bright orange".
Actors with learning disabilities and Down's Syndrome have travelled to Lesotho in South Africa as part of theatre project.