Gardai arrested a man in his 40s and a woman in her 30s this morning.
They're being detained at Pearse Street Garda Station.
At around 11am yesterday morning gardaí were called to an incident at Markievics House on Townsend Street.
A man in his 50s was found with a stab wound and taken to St James' Hospital where he was later pronounced dead.
Gardaí have not yet launched an official murder investigation as they are awaiting the results of a post mortem which will take place this afternoon.
They say they are investigating all of the circumstances surrounding the death and that the scene remains sealed off.
Tesla Opens Wicklow Supercharger Station Adding Eight High-Speed Stalls
Almost a Third of Road Deaths Involve Young Drivers, Wicklow Gardaí Warn Ahead Of Bank Holiday
Garden County Housing Figures Buck National Trends
Outpouring Of Love And Tributes to Musician Glen Hansard
Wicklow Beaches To Host Kids Sea Safari Workshops In August