The 18-year-old star made history earlier this year by becoming the youngest-ever winner of the PDC World Championship and has scoffed at a suggestion made by fellow player Nathan Aspinall that he could "be off in about five years".
Speaking ahead of the Premier League Darts play-offs at London's O2 Arena on Thursday (29.05.25), Littler said: "I know I've heard that, I don't know where he's got that from - don't worry, I'll be here in 10 years.
"It's crazy to even think about retiring. If I win 16 world titles like Phil (Taylor), I'll retire, but I'm not even thinking about retirement at the minute - the money is there to be won, especially the World Championship but not only that everything has gone up.
"It is all about what you're feeling and I'm sure I'll be here for a long time."
'The Nuke' is aiming to defend his Premier League crown and knows that people have been desperate to beat him since he burst onto the scene by reaching the final of the World Championship in 2024 at the age of 16.
Littler said: "For the last 18 months there's been a target on my back. Since I first came on tour and made the World Championship final, I just knew.
"From the moment I walked into my first Pro Tour [floor competition], I knew everyone wanted to beat me. That is still the same now. There will always be a target on my back and I know if I'm not on my A-game, they will catch me out."