A man has plunged to his death after "planking" on a seventh-storey balcony in Brisbane's inner-south this morning, police have confirmed.

Acton Beale, aged 20, fell from the balcony of a unit block on Main Street in Kangaroo Point shortly before 4.30am.

Acton Beale, 20, died after plunging to his death after a stunt known as "planking" went horribly wrong. Photo: Facebook

He was trying to lay face down on the balcony railing of his apartment when he suddenly fell.

Paramedics spent 20 minutes trying to revive Mr Beale at the scene, however, he died a short time later.