Dean Henderson was loaned to Nottingham Forest on 4 August 2021. Moving to Forest was seen as an opportunity for Henderson to secure regular first-team football in order to maintain his development and match fitness. This loan spell was also pivotal for Nottingham Forest as they looked to secure promotion to the Premier League, leveraging Henderson's experience and skills between the posts.

Dean Henderson made his first Premier League start for Manchester United on 3 March 2021 in a match against Crystal Palace. The match ended in a 0-0 draw, and Henderson impressed with a clean sheet performance. This start was significant as it marked the beginning of his challenge for the first-choice goalkeeper position at the club, a role traditionally held by established number one David de Gea.

On 24 October 2020, Dean Henderson made his Premier League debut for Manchester United coming on as a substitute in a match against Chelsea which ended in a goalless draw. This debut was a significant step in his career, signaling the beginning of his active involvement in Manchester United's first team and showcasing his potential to become their long-term first-choice goalkeeper.

On 26 August 2020, Dean Henderson signed a new long-term contract with Manchester United, securing his future with the club until at least June 2025. This agreement came after his successful loan at Sheffield United and was a testament to the confidence Manchester United had in him as a future first-choice goalkeeper. The deal also included an increase in his salary to reflect his rising status in football.

Dean Henderson's loan spell with Sheffield United ended after the conclusion of the 2019–2020 Premier League season. During this time, he established himself as one of the league's standout goalkeepers, earning plaudits for his performances and helping the team to a ninth-place finish, which was their best in the top-flight for several years. His success at Sheffield United raised his profile significantly.

Dean Henderson made his debut for the England Under-21 team on 6 September 2019 in a match against Turkey. This debut was a milestone in his international career, demonstrating his progression through the ranks of England's national teams. Henderson's performance earned him praise and was part of his journey towards eventually breaking into the senior national team setup, showcasing his talents on an international stage.

Dean Henderson played in the League One play-off final on 27 May 2018 for Shrewsbury Town. Although the team ultimately lost to Rotherham United, Henderson's performances throughout the season, including in this final, were crucial in helping Shrewsbury reach the play-offs. His goalkeeping skills were highlighted as a key factor in the team's successful campaign that year.

Dean Henderson began a loan at Shrewsbury Town in January 2018 for the remainder of the 2017–2018 season. During his time at Shrewsbury, he quickly became a key player, with his performances in goal contributing significantly to the club's successful campaign in League One. His ability to make crucial saves at important times endeared him to the fans and earned him accolades as one of the standout goalkeepers in the division.

In June 2017, Dean Henderson was part of the England U-20 squad that won the FIFA U-20 World Cup in South Korea. This victory marked England's first World Cup win since 1966. Though primarily a squad player, Henderson's involvement in the tournament contributed to his development on the international stage, providing vital experience in high-pressure matches and helping to hone his skills at a young age.

Dean Henderson was born on 12 March 1997 in Whitehaven, Cumbria, England. Henderson's interest in football began at a young age, eventually leading him to join the Manchester United Academy. His journey through the ranks of youth football set the stage for a promising career in professional soccer, where he would eventually play for several high-profile teams and earn recognition at the international level.