Published Friday, 18 November 2011
Miller has won several awards for his portrayal of Aaron, who was recently involved in one of the most heartbreaking love stories in the show's history.
The character stood trial for the murder of his tetraplegic boyfriend Jackson Walsh, after helping him to die.
Announcing his decision to go in Spring 2012, Miller thanked his Emmerdale colleagues and hinted it may not be his last appearance in the Dales.
He said: "I am so grateful to Emmerdale for the opportunity that I have been given and have loved every moment.
"I will miss everyone enormously but this might not be the last we see of Aaron."
Series Producer Stuart Blackburn said: "We completely respect Danny's decision and are very grateful for the hard work and commitment he has brought to his role.
"We wish him all the best for the future and in the meantime there is still plenty more drama to come from Aaron well into 2012."