Louis Reed celebrates his 18th birthday on Saturday and has more reasons to celebrate than most.
That's because the Blades graduate has signed a new three-year contract at Bramall Lane which will come in to operation on his birthday.
"Louis is another homegrown player and his new contract is another sign of how we appreciate the work that goes on at our Academy at Shirecliffe," said boss Nigel Adkins.
"He played a good amount of games last season and was recognised at his age group level by England but Louis is a well grounded lad and knows that there is plenty of hard work ahead of him as he bids to build a successful football career.
In April 2014, Reed became United's youngest ever player in a league game when, at the age of 16 years and 257 days, he was introduced as a substitute in the 1-0 victory over Rotherham United.
Last season he continued his development, starting the first game of the season and going on to make a total of 32 appearances in all competitions, as well as being called up to represent England at under 18s level.
He commented: "Being in and around the first team all last season was a great learning experience for me. Yes, the season ended in disappointment but it is another memory I can learn from as we look to win promotion this time around.
"This is a fantastic Club to involved with, myself, along with Diego (De Girolamo), Connor (Dimaio) and Dom (Calvert-Lewin) have all come through the Academy and have to thank coaches there for setting us up to challenge for a first team place."