The 16-year-old faces Rob Cross in the first of two semi-finals this evening.
Should he win, Littler will book his spot in tomorrow’s final where he will face either Scott Williams or Luke Humphries.
He will also become the youngest-ever World Championship finalist.
But how could the teenager’s life change if he goes all the way to win the tournament?
Celebrity status
Littler has become a household name in recent weeks amid his incredible success at the World Darts Championship.
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His social media following has skyrocketed, with the likes of Declan Rice, Aaron Ramsdale, James Maddison and Rio Ferdinand among his top supporters.
The darts star was seen taking selfies with some fans following his quarter-final win over Brendan Dolan on Monday – and he will likely have to get used to that given his new found fame.
Littler has even been named as an early frontrunner for this year’s Sports Personality of the Year award.
Cash for a car
Littler has been guaranteed at least £100,000 in prize money for reaching the semi-finals of the World Darts Championship.
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If he gets to the final he will pocket £200,000 and if he wins he will rake in a whopping £500,000.
With all that money he will be able to buy himself a car – ready for when he turns 17 and learns to drive later this month.
Spending spree
The 16-year-old recently revealed what he will spend his prize money on.
Speaking to The Telegraph, he said: “I always treat myself to some Under Armour tracksuits.
“And just get myself a new coat and get myself some Fifa points for my Xbox. That’s pretty much it.”
He is also set to treat his mates to a trip to Blackpool or Alton Towers.
Sponsorship deals
Littler is expected to received several sponsorship offers once the Championship draws to a close.
One kebab firm as already asked if they can sponsor him, while another has offered the darts star free kebabs for life if he wins the tournament.
Big pressure
Should he take home the Sid Waddell Trophy on Wednesday, Littler will likely return to Ally Pally in December as one of the favourites.
The expectation on him will be high, but The Nuke has already shown that he is calm and confident under pressure.