Andrew Scott has been named best actor at the 2013 BBC Audio Drama Awards, for his performance in a Radio 4 adaptation of Harold Pinter's play Betrayal.
Scott – best known as villain Moriarty in BBC1 drama series Sherlock – added the prize to the best supporting actor gong he picked up last year.
Michelle Fairley, who has appeared in HBO fantasy drama Game of Thrones, won best actress, while David Troughton and Line of Duty's Vicky McClure were named best supporting actor and actress.
The winners were announced by last year's best actor winner and former Doctor Who star David Tennant at an event at BBC Broadcasting House.
"Acting on the radio is challenging, inspiring, delicate and always a privilege," said Tennant. "Radio drama is often overlooked and undervalued next to its showier younger siblings on the television and in the cinema, and yet it is on the wireless that so many important and brilliant talents have been discovered and nurtured."
This is the second year that the BBC has held the Audio Drama Awards.