"I was relaxed tonight and played really well all weekend," said Littler after the match.
"I'll keep building on this and win more; I've got a full programme coming up and I'm ready for it."
Littler was the stand-out player all weekend. "The Nuke" scored 103, 102, 103 and an incredible 108 points on his way to the final.
However, he needed a few legs against Smith before he checked 140 and 130 to take a 3-2 lead with a break. But the "Bully Boy" didn't give up and got the direct re-break.
What followed was nothing short of world-class as Littler won the next seven legs and broke his opponent's throw four times in the process.
At 10-3 in favour of the 17-year-old, Smith came back into the match with a re-break. But "The Nuke" was unstoppable and secured the title with another break.
In the end, Littler again threw an average of over 100 (102.21) and confirmed this with a checkout rate of 33.33%.
Smith, like all of Littler's opponents in Amsterdam, was unable to keep up.
Littler's path to the final
Littler's closest match of the weekend was his first round match. He won 6-5 against Ross Smith, partly because his opponent had an incredible double rate of 50%.
This was followed by a 6-4 win against youth hero Raymond van Barneveld, a 10-7 win against Chris Dobey and an 11-4 win against Michael van Gerwen on the final day.
With his average of 107.95, he didn't even give Van Gerwen even the slightest chance in the semi-finals.