The future is already here!
As many as eight youngsters under the age of 18 have played first-team football in one of Europe's top five leagues so far this season - the youngest was only 15 at the time.
From the Premier League, Serie A, Ligue 1 and the Bundesliga, here's a look at the kids flying the flag for the next generation of stars...
8. Alexander Isak - Borussia Dortmund
17 years, 11 months, 27 days
Borussia Dortmund 5-0 Cologne - 17th September, 2017
Described as the 'new Ibrahimovic' by a former AIK Stockholm team-mate, Alexander Isak has been part of Borussia Dortmund's matchday squad on a regular basis this season.
The forward made his debut in the DFB Pokal in 2016/17 and got on the pitch in the Bundesliga for the first time last month as a substitute against Cologne.
7. Jann-Fiete Arp - Hamburg
17 years, 8 months, 24 days
Hamburg 0-0 Werder Bremen - 30th September 2017
German forward Jann-Fiete Arp made his Bundesliga debut for Hamburg against Werder Bremen at the end of last month, appearing as a late substitute.
He has since made his second first-team appearance, marking a 34-minute cameo against Hertha Berlin with a maiden goal. Unfortunately, Hamburg lost the game 2-1.
6. Jadon Sancho - Borussia Dortmund
17 years, 6 months, 26 days
Eintracht Frankfurt 2-2 Borussia Dortmund - 21st October 2017
Former Manchester City talent Jadon Sancho made the high profile move to Borussia Dortmund in August and was immediately assigned the club's number seven shirt.
The London-born forward was actually recalled early from World Cup duty with England's Under-17 team to make his first-team debut for Dortmund this month.
5. Moise Kean
17 years, 6 months, 13 days
Hellas Verona 0-5 Fiorentina - 10th September 2017
Juventus starlet Moise Kean hit the headlines last season when he became the first player born in the 21st century to play in both Serie A and the Champions League.
Kean is spending this season on loan with Hellas Verona. After making his Serie A debut for the club in early September, he has played eight league games, starting three of them.
4. Rekeem Harper - West Bromwich Albion
17 years, 5 months, 4 days
West Bromwich Albion 1-0 Bournemouth - 12th August 2017
Prior to joining Blackburn on a season-long loan at the end of August, Rekeem Harper had worked his way into the first-team picture at parent club West Brom.
The home-grown youngster appeared from the bench in a Premier League win for the Baggies over Bournemouth. He also later played in the EFL Cup and has featured twice while on loan.
3. Pietro Pellegri - Genoa
16 years, 6 months, 0 days
Genoa 2-3 Lazio - 17th September 2017
Genoa's Pietro Pellegri was no stranger to first-team football prior to this season - he made his senior debut last season while only 15 years of age, equalling a Serie A record in the process.
So far this season, Pellegri has played five times in the league. The youngster even scored twice in a 3-2 defeat against Lazio in his first appearance of the campaign.
2. Willem Geubbels - Lyon
16 years, 1 month, 7 days
Lyon 3-3 Dijon - 23rd September 2017
Lyon have established a good reputation of developing young players in recent years, with Willem Geubbels the latest off the production line after he appeared against Dijon last month.
Incredibly, the emerging winger only celebrated his 16th birthday in August. That six minute cameo remains his only senior appearance so far, but surely won't be his last.
1. Eddy Salcedo - Genoa
15 years, 10 months, 20 days
Sassuolo 0-0 Genoa
Having turned 16 years of age at the start of October, home-grown Genoa forward Eddy Salcedo was in the team earlier this season while he was still only 15.
That appearance in Serie A was a nine-minute cameo in the opening day of the season against Sassuolo. Salceco has remained in the squad ever since, now a regular on the bench.