Chelsea have some very exciting youngsters coming through their youth system at the moment.
While they usually send their young prospects out on loan, some have been given their opportunity to shine in recent times.
Callum Hudson-Odoi made his debut at the age of 17 earlier this year and has the potential to be a star, while Ethan Ampadu is another who is rated extremely highly.
Hudson-Odoi became Chelsea's second youngest Premier League player in February and was just four days younger than Amapdu when he made his debut in the competition.
But Chelsea have also given Premier League debuts to a number of other 17-year-old's.
So, with that said, what happened to the 10 youngest players to appear for Chelsea in the competition?
1) Jody Morris - 17 years 43 days
Morris made his debut just after his 17th birthday and went on to become an established member of Chelsea's first team.
He left in 2003 and went on to play for Leeds, Rotherham, Millwall and St Johnstone before hanging up his boots with Bristol City in 2013.
He is currently assistant manager to former Chelsea teammate Frank Lampard at Derby County.
2) Callum Hudson-Odoi - 17 years 84 days
Chelsea's most exciting youngster is currently on the fringes of the first team and has appeared seven times for the club.
3) Ethan Ampadu - 17 years 88 days
The Welsh international made seven appearances for the club last season but is yet to feature this campaign.
4) Ben Sahar - 17 years 155 days
Sahar has been all over the world since leaving Chelsea in 2009.
He's played for 13 clubs including Espanyol, Hertha Berlin and Auxerre.
Now 29, he is currently having a successful spell back in Israel with Hapoel Be'er Sheva.
5) Josh McEachran - 17 years 207 days
There were such high hopes for McEachran but he never made the grade at Chelsea.
He was sent out on loan five times during his time at Chelsea and eventually left the club to join Brentford in 2015.
6) Robert Huth - 17 years 265 days
The German defender played 42 times for Chelsea between 2002 and 2006.
He later joined Middlesborough and went on to have successful spells with both Stoke City and Leicester City.
7) Sam Hutchinson - 17 years 282 days
Hutchinson retired in 2010 due to a knee injury but managed to return to the game a year later.
He's forged a good career in the Championship with Sheffield Wednesday.
8) Nathan Aké - 17 years 311 days
One of the more impressive names on the list.
Ake left in a £20 million move to Bournemouth in 2017 and has become an integral figure for The Cherries.
Chelsea inserted a buy-back clause in the deal and they could decide to bring him back to the club if he continues to shine.
9) Mikael Forssell - 17 years 321 days
Forssell would play 53 times for Chelsea and score 12 times before leaving the club in 2005.
He played for the likes of Hannover 96 and Leeds United before announcing his retirement from professional football with HIFK in 2018.
10) Anthony Grant - 17 years 340 days
Grant appeared just once for Chelsea in the league, coming on as a 90th minute substitute against Manchester United in 2005.
He has forged a successful career in England's lower leagues with the likes of Southend, Stevenage and Peterborough.
Now 31, he is currently playing for Shrewsbury Town in League One.