The 24 year old joined the Millers on a 2 year deal from Hamilton, and tell's the clubs official website that he's grateful to have his future sorted early.
"I'm delighted that I've been given the opportunity to come and play here, It is a big step. It is going to be a challenge for me but I like challenges and it will be a good experience."
"It's been a difficult time but I've been out jogging when I can and doing loads of other work at home, probably annoying my mum by using her gym equipment, I've met two of the boys in person already and they've warned me about how intense it can be but everyone knows it is going to be hard. As long as you're ready to work hard then I'm sure it will be good. I couldn't tell you the last time I had a 'proper' training session, so it will be good."
"It will be nice just to have the whole routine of being back to football is going to be nice."
With the Covid-19 restrictions in place at the minute, Miller's signing was a strange one behind a video screen with the Boss Paul Warne; "We've had several Zoom calls, I met him and the rest of the team on there, so I'm just delighted that he chose me and I'm ready to get going,” he revealed.
"I'm delighted to be able to be given the opportunity to come and play here in the Championship, I'm a winger and I can play either side, or down the middle sometimes. I'm pretty flexible in that respect.”