Rapper Juice Wrld has died aged 21 after suffering a reported seizure at Chicago's Midway airport Sunday morning.

The up and coming star was bleeding from the mouth when medics arrived, according to TMZ.

He is understood to have been conscious before being rushed to hospital, where he was declared dead.

A cause of death is not yet known Juice Wrld, real name Jarad A Higgins, is said to have fallen ill after landing into Chicago from California early Sunday morning.

He was walking through the airport when sources tell TMZ he suffered the seizure.

Juice Wrld had enjoyed hits with Lucid Dreams in 2018 and All Girls Are the Same.

TMZ reports that the Interscope-signed artist, real name Jarad Anthony Higgins, flew from California to Chicago Sunday morning