Plenty of young players made their debuts - and made an impact - in 2017. And three in Everton colours in particular.
2017 has seen plenty of new faces arrive in the Premier League. There have been a handful of players who've really made a name for themselves in the last 12 months, whether they've come through their respective academies or broke from the fringes into the first team.
Although he made his Everton debut in 2016, Davies really established himself in the Everton side in 2017. He announced himself to the world of football with a goal and a man of the match performance in a 4-0 win over Manchester City way back in January.
Tom Davies of Everton chases down Sadio Mane of Liverpool during the Premier League match between Liverpool and Everton at Anfield on December 10, 2017 in Liverpool, England.
The 19-year-old hasn't looked back, and has played with maturity and has became a key player as Everton finished seventh and qualified for Europe last term. Davies has continued to be a regular in the Everton side this campaign.
Harry Winks may have made his debut back in 2014, but his breakthrough as a Spurs starting player has come this season.
Harry Winks of Tottenham Hotspur and Lucas Vazquez of Real Madrid compete for the ball during the UEFA Champions League group H match between Real Madrid and Tottenham Hotspur at Estadio...
This season the 21-year-old has started nine out of 15. Winks has looked more than comfortable on the big stage, his performance in both ties against Real Madrid were his standout moments this season. His performances earned him an England call up, and he made his national team debut in October in a 1-0 victory against Lithuania, where he was man of the match.
Another one of 2017's standout breakthrough players from Everton is Dominic Calvert-Lewin. The 20-year-old moved to Goodison Park in August 2017 and after a few substitute appearances. He ended the 2016-17 season as a regular in the side, making six starts in 2017 and scored his first Everton goal in March against Hull City.
This season the former Sheffield United front man has featured in all of the Toffees league games, starting 13 out of 18, and has established himself as a key player for Everton. There's even talk about whether he could be Romelu Lukaku's long term replacement.
Dominic Calvert-Lewin of Everton during the Premier League match between Everton and Swansea City at Goodison Park on December 18, 2017 in Liverpool, England.
He's scored seven goals in all competitions so far this season, more than Everton's other centre forwards Oumar Niasse and Sandro Ramirez. He's been part of a now firing attacking quartet alongside Gylfi Sigurdsson, Aaron Lennon and Wayne Rooney who are all bringing the best out of each other.
The third an final Everton breakthrough star is Jonjoe Kenny, who's established himself as Everton's main right-back this season. He's been a regular starter since October and has been improving with each game. He has been one of Everton's best and most consistent players so far this season.
Jonjoe Kenny of Everton is watched by Nathan Dyer of Swansea City during the Premier League match between Everton and Swansea City at Goodison Park on December 18, 2017 in Liverpool,...
The 20-year-old had loan spells at Wigan Athletic and Oxford United during the 2015-16 season, and his performances will give make Seamus Coleman's life harder when he returns from injury.
He may have been around football for a while, but in terms of the Premier League, James Tarkowski has finally broken into the Burnley's first team and has taken his opportunity by storm.
A solid defence of Michael Keane and Ben Mee limited the 25-year-old's chances last term, but he was always ready and never really put a foot wrong when called upon. Sean Dyche showed faith in Tarkowski instead of replacing Keane with a big money signing - and it's paid off magnificently.
Glenn Murray of Brighton and Hove Albion wins a header over James Tarkowski of Burnley during the Premier League match between Brighton and Hove Albion and Burnley at Amex Stadium on...
He's been ever present for the Clarets this season and an instrumental figure in helping them keep so many clean sheets and to be potentially competing for a place in Europe next season.