Luke Littler's sensational run at the PDC World Darts Championship continued as the 16-year-old beat Rob Cross to storm into the final.
Littler, playing in his first world tournament, won 6-2 and will face Luke Humphries, who beat Scott Williams 6-0.
Littler, who has now earned £200,000, is the youngest person to reach the final, overtaking Kirk Shepherd who was 21 years and 88 days old in 2008.
"It is crazy to even think I am in the final on my debut," he said.
Littler told Sky Sports: "I was happy to win one game and now I can go all the way. It's not easy. You are playing Rob, he is a world champion who won on debut. I've got no words."
Asked about his preparation for Wednesday's final, Littler added: "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."
Humphries became the new world number one after reaching the final for the first time and will represent Littler's toughest test.
Littler's run to the final
Round 1: Beat Christian Kist 3-0
Round 2: Beat Andrew Gilding (ranked 20) 3-1
Round 3: Beat Matt Campbell 4-1
Round 4: Beat five-time world champion Raymond van Barneveld (28) 4-1
Quarter-final: Beat Brendan Dolan (29) 5-1
Semi-final: Beat 2018 PDC world champion Rob Cross (8) 6-2
Littler's record run continues
Littler, who turns 17 on 21 January, was serenaded by the Alexandra Palace crowd as the pair warmed up, with "there's only one Luke Littler" and "walking in a Littler wonderland" ringing round the famous amphitheatre.
Many pundits predicted that Littler would outscore 2018 champion Cross, 33, and that ended up being the case, despite some initial scrappy and nervous darts.
He finished with a three-dart average of 106.05 compared to Cross' 102.77.
It is the fourth match of the tournament that Littler has averaged more than 100. No other player has done that with already eliminated Chris Dobey next on three occasions.
Littler started the tournament ranked 164th in the world and had a provisional ranking of 50 heading into the semi-finals. He could rise as high as ninth and win £500,000 if he is successful in Wednesday's final.
He had only played four senior matches at PDC premier events before making his debut on 20 December and now has the opportunity to be the youngest winner of the tournament, surpassing Michael van Gerwen, who was 24 years and nine months old when he won his first title in 2014.
Littler lost the opening set for the first time in the tournament before he recovered to take a 3-1 lead, including taking out 142 in the third set.
Cross won the next set, breaking Littler's throw with a 138, before he struggled to keep up with his opponent's high-scoring game as the 16-year-old won three sets in a row to seal the victory.
Littler threw 16 maximums, compared to Cross' 10, but it was the checkout accuracy that really cost the former champion.
At one stage Littler's checkout percentage was 64.7 and Cross' 34.8. That closed to 46.8 and 41.7 by the end but the Warrington teenager had opened up too much of a gap at that point.
"I just wanted to win my first-round game," Littler told Sky Sports. "I heard he [Christian Kist] was struggling with an injury but I blocked it out. I knew I was spending more time in London so then my next target was to spend Christmas with the family and then come back and I did and here I am in the final.
"I've just settled on that stage. It takes me a few legs to settle but then I'm good to go.
"There's no more development tour for me now! I'm happy to be in the top 32 and I can go even higher."
Humphries charges into final
Humphries has now won 18 games in a row as he charges to the top of the world rankings.
The 28-year-old has reached three quarter-finals at the World Championship, but he had never averaged more than 100 at this tournament until his quarter-final.
He averaged 108.74 against Williams, 33, which is in the top 10 in the history of the tournament, and took out scores of 100-plus on six occasions.
"It feels amazing. I would never have imagined myself to be the world number one, that is a special, special feeling," Humphries told Sky Sports.
"To do it in style too, I was really pleased with that performance. Like I've said in many interviews, world number one can last a couple of months, world champion is forever."
On Littler, Humphries said: "I've seen the way he's played many, many times but when you come on this stage it can be a lot tougher but he's just proved that he's got a lot of bottle.
"Nothing is going to phase him. I'm probably going to have to play the game of my life.
"I've got an uphill task and hopefully we can give the people one of the best world finals ever seen."
Humphries has now won 18 games in a row as he charges to the top of the world rankings.
The 28-year-old has reached three quarter-finals at the World Championship, but he had never averaged more than 100 at this tournament until his quarter-final.
He averaged 108.74 against Williams, 33, which is in the top 10 in the history of the tournament, and took out scores of 100-plus on six occasions.
"It feels amazing. I would never have imagined myself to be the world number one, that is a special, special feeling," Humphries told Sky Sports.
"To do it in style too, I was really pleased with that performance. Like I've said in many interviews, world number one can last a couple of months, world champion is forever."
On Littler, Humphries said: "I've seen the way he's played many, many times but when you come on this stage it can be a lot tougher but he's just proved that he's got a lot of bottle.
"Nothing is going to phase him. I'm probably going to have to play the game of my life.
"I've got an uphill task and hopefully we can give the people one of the best world finals ever seen."
