Girl, 15, still missing after two months

Police say they have serious concerns for the safety of a 15-year-old from northern NSW who has now been missing for two months.

Emma Selby, from Alstonville, was last seen with a friend in the beach town of Byron Bay late on Friday, March 28.

She was reported missing a short time later.

It's believed Emma may have been making her way to Brisbane when she disappeared, but police have also received reports of possible sightings in western Sydney.

"The missing girl has no access to money and police have serious concerns for her welfare and safety," police said in a statement.