Muir said "My dad, after school, called me and my mum into the front room and said 'I got news for you - you are in the squad for the first team on Tuesday’. I was out of words, I didn’t know what to say.
"It was brilliant, they looked proud. really proud, which made me smile. It’s a good feeling.
"Some of my teachers were here as well - they came to watch and are proud of me. When I was warming up down there they were asking for pictures and that."