The Iconic is offering free same evening delivery through to Christmas Eve.
The Iconic experienced on of its highest traffic spikes just before midday on Christmas Eve last year.
The etailer is expecting another spike with the addition of delivery in Adelaide and the new twilight service.
The Iconic has over 700 brands and 45,000 products available.
It recently partnered with Australia Post to offer Saturday parcel deliveries.
The Iconic offers customers free overnight shipping, 100 day free returns, and 3 hour delivery in Sydney and Melbourne.