The 17-year-old penned a two-year deal with the Owls on Wednesday.
The 17-year-old son of former Owls striker David Hirst put pen to paper on a deal until the summer of 2018 to end speculation about his future for the foreseeable future.
A regular goalscorer for Wednesday's under-18s side, Hirst had been linked with clubs such as Leeds United after impressing upon making the step up to under-21s level side this season.
However, he has now decided to commit his future to the club at which his father is still working as an academy coach, and expressed his delight at being able to stay at Hillsborough.
Hirst told the club's website: "Wednesday are my boyhood club and it is a dream to sign on professional terms. I am absolutely delighted to sign and there is nowhere else I would rather be.
"I came here five or six years ago and from then, I’ve never really looked back and here I am today signing my first contract. Obviously the hard work really begins now. I’ve worked hard to get this opportunity and now it’s all about kicking on, becoming a better player and who knows maybe the first team in the near future hopefully
"This has been a season to remember, that is for certain. Getting the England call-up was an amazing experience and the goals topped it off for me really. Now I have got a taste for it, I want even more. I want to keep playing well for Wednesday, keep scoring the goals and hopefully more England call-ups will come."
As alluded to by the teenager, his success at academy level for Wednesday this season has led to involvement with the England Under-17s side earlier in the year, where he made an explosive impact.
Handed his debut for the Three Lions youth side, Hirst made the best possible start to life in the international picture, scoring two goals in a 2-2 draw with Germany.
Close eyes will be focused on the striker's development over the next couple of years, with Hirst showing all the signs that he has the potential to develop into a promising first-team prospect.