Mia is 14 and is from Ryde on the Isle of Wight.
She was last seen getting off a ferry in Southampton at 2.30pm this afternoon.
She is described as white, 5ft 2ins, of slim build and has very long blonde hair, which has some pink colour in it. She was last seen wearing grey or black trousers and a black puffa style coat.
Mia, if you’re reading this, please get in touch to let us know you’re ok.
If you think you’ve seen Mia or have any other information about her whereabouts, please call us on 101.