South Wales Police officers investigating the murder of Andrew David Male from Aberdare on January 9 are trying to identify these two potential witnesses.
They were captured on CCTV at 1am on the same day, talking to Andrew Male on the corner of Cardiff Road and Lewis Street, Aberaman, in Aberdare.
Officers believe the two men may have been the last two people to speak to Andrew before he died.
They, or anyone who knows who these two men are, are urged to come forward with information.
They can contact the incident room on 01656 306099 or call Crimestoppers anonymously on 0800 555 111
18 year-old Corey Thomas was charged with murder on January 11.