The 18-year-old's alter ego Aaron Livesy will be seen trying to kiss his best friend Adam Barton (Adam Thomas) next week after they become involved in a car accident. The surprise moment sparks a journey of self-discovery for the village bad boy, who has previously shown no signs of being attracted to men.
In an interview with DS, Miller has claimed that viewers can expect Aaron's experience to be "different" to other soap sexuality plotlines "because it's so unexpected".
He commented: "If you could pick one person in the village in Emmerdale who's gay, the last person you think of will be Aaron. You wouldn't think he's gay and the point is he's not gay - he's not come out gay, and all of a sudden he's in a relationship with a lad or something like that. He's still trying to hold it in.
"I don't think any of the other soaps has ever had this alone character eating himself up inside and trying to convince himself more than anyone that he's not gay and doing anything in his power to prove that he's not gay."
Miller added that the plot is also unusual because he has not yet been told whether Aaron is homosexual.
"I don't know whether he is or he isn't. He's a very confused young lad," he explained.
"He's had a lot of problems in the past with his dad and with his mum, so he's never had anybody who can put their arm around him and tell him it's going to be alright. That's what's different about the story and the character. I don't think any other soaps have put this across."
> Click here to read our interview with Danny Miller
> Click here to read more from Danny Miller in Soap Scoop