The forecourt of the iconic Australian landmark will be closed to the general public on Wednesday when Jimmy Donaldson, better known as MrBeast, gives away 10 cars including a Lamborghini.
The giveaway is a marketing event for the internet celebrity's chocolate bar Feastables, with a limited number of free tickets for those who bought them.
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The forecourt will be closed to the public between 6.30am and 9pm with the main event running from 2pm to 4pm. Those attending will be filmed for the YouTuber to use on his channel.
The 26-year-old rose to internet fame with consistent content creation that eventually earned him the accolade of YouTube's most popular creator, reaching 288 million subscribers.
Early videos included challenges such as counting to 100,000 in a single video, which took 40 hours to complete.
As his popularity increased, he started making money from the platform - becoming a multimillionaire in the process - which he reinvested into large giveaways to leverage further success.
Starting with smaller giveaways to strangers for amounts in the hundreds, his giveaways later stretched out to a $US1 million prize for the last person to take their hand off a pile of money.
More recently, he gave away an island in the Bahamas to one subscriber.