The 16-year-old swept aside the former world champion at Alexandra Palace on Tuesday night, losing the opening set before storming to a 6-2 win in their semi-final showdown.
Littler will take on Luke Humphries or Scott Williams on Wednesday night after extending his remarkable run in the competition.
Before then, the teenager will be keeping the same routine that has guided him to the brink of darts history with a breakfast omelette and a pizza when he arrives at the venue tomorrow afternoon.
Asked how he will prepare for Wednesday’s final, Littler told Sky Sports: ‘I’ll be doing what I’ve been doing.
‘In the morning I’ll go for my ham and cheese omelette and then come here, have a pizza and then prep on the board. That is what I’ve done every day.’
In reaching the final in what is his competition debut, Littler has already made history, becoming the youngest World Championship finalist in history after Kirk Shepherd, who was 21 when he reached the final in 2008.
Michael van Gerwen holds the record for youngest ever champion after winning his first title in 2014 aged 24, eight years older than Littler.
Littler arrived in the capital with the goal of still being in the competition after Christmas.
Since then, he has swept aside five-time world champion Raymond van Barneveld and Brendan Dolan before adding 2018 champion Cross to his list of victims.
‘I have no words, it’s just crazy, that I’m in a World Championship final on my debut,’ he said.
‘I was happy winning one game but I could go all the way.
‘My target was to still be here after Christmas and now here I am in the final.
‘I’ve just settled on the stage – once I find the rhythm, I’m good to go.’
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