Manchester United is one of the most successful clubs in the world, and its history is full of the best players. So which are the best players to have ever graced the Old Trafford turf? Here we look at Manchester United's all-time best XI.

The Goalkeeper

In goal, it has to be Peter Schmeichel. The Great Dane was a huge part of United's success in the 1990s, winning five Premier League titles, three FA Cups and the Champions League in 1999. He was an intimidating presence in goal and a vocal leader on the pitch, setting the tone for the rest of the team.

The Defence

In defence, there's no doubt that Gary Neville should be included. The right-back was part of the famed 'Class of 92' and was a key part of the United team for 19 years, winning eight Premier League titles and two Champions Leagues. He was a reliable defender and a leader on the pitch.In the centre, Rio Ferdinand was another key part of United's success in the 2000s. His defensive partnership with Nemanja Vidic was one of the best in Premier League history and he was instrumental in United's Champions League victory in 2008.

The Midfield

In midfield, the first name that comes to mind is Ryan Giggs. The Welshman was part of the 'Class of 92' and was a key part of United's success, winning 13 Premier League titles and two Champions Leagues. He was an excellent winger and a creative force in the United team.Paul Scholes is another name that must be included. The 'Ginger Prince' was a creative force in the United midfield for 20 years, winning 11 Premier League titles and two Champions Leagues. He was a master passer of the ball and a leader on the pitch.

The Attack

Up front, there's no doubt that Cristiano Ronaldo must be included. The Portuguese forward was at United for six years, winning three Premier League titles and the Champions League in 2008. He was a prolific goalscorer and a creative force in the United attack.Wayne Rooney is another name that must be included. The England international was at United for 13 years, winning five Premier League titles and the Champions League in 2008. He was a clinical finisher and a leader on the pitch.

So that's the Manchester United all-time best XI. With such a strong and talented team, it's no wonder that United have been so successful in the past.