The actor, who bows out on screen as Aaron Livesy tonight (April 5), has signed up to play Prince Charming in a production of Cinderella at The Grand Theatre in Blackpool.
Channel 5's Milkshake presenter Amy Thompson will also be starring in the show, which runs for a month.
Cinderella kicks off on Friday, December 7 and continues until January 6, 2013.
Miller confirmed the news on This Morning today, adding that he is keen to secure a part in a play or TV drama following his Emmerdale exit.
The 21-year-old filmed his final Emmerdale scenes last month after four years in the role of Aaron.
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