Police are calling on the public for information in the search for a missing teenager.

Lily McTiernan, 15, was last seen on Friday in Belconnen.

She is described as about 150 centimetres tall with a slim build and brown hair.

She was last seen wearing a black Nautica hat, navy long-sleeved shirt and a short denim skirt.

Police want to assure Lily she is not in trouble and want to find her to make sure she is safe.

Anyone with any information regarding Lily's whereabouts are urged to contact ACT Policing on 131 444.