Vladimir Stojkovic, Serbia
Vladimir Stojkovic, 35 next month, has since making his national team debut in 2006, gone onto make 81 appearances for Serbia.
Johnny Acosta, Costa Rica
Defender Johnny Acosta, 35 next month, has played 45 times for his country and is set to feature in his second World Cup this summer.
Michael Krohn-Dehli, Denmark
Midfielder Michael Krohn-Dehli, 35, has since spent much of his career playing in Spain. Krohn-Dehli left Sevilla to join Deportivo La Coruna in January on a free transfer after spending three years in Seville.
Olafur Ingi Skulason, Iceland
Olafur Ingi Skulason, 35, failed to make a first-team appearance in four years at Arsenal between 2001 and 2005. He has 36 caps for Iceland, but he was not in their famous 2016 European Championship squad.
Martin Silva, Uruguay
The 35-year-old goalkeeper who has been play for Brazilian side Vasco de Gama since 2014, has been capped nine times so far for his national team.
Eiji Kawashima, Japan
Japanese keeper, Eiji Kawashima who has turned out for Standard Liege in Belgium, Dundee United in Scotland, and now FC Metz in France, made his debut for Japan in 2008 and has now been capped 82 times by his country.
Pepe, Portugal
35-year-old defender, Pepe, who had a 10-year spell at Real Madrid and has been capped 91 times for Portugal.
Kari Arnason, Iceland
Centre-back Arnason has played 67 times for Iceland and was part of the starting XI which shocked England at Euro 2016.
Alfredo Talavera, Mexico
The 35-year-old goalkeeper has made just under 300 appearances for Toluca, but since making his debut for Mexico in 2009, he has been capped 27 times by his country.
Luis Tejada, Panama
Since debuting with Panamanian side Tauro in 2001, Tejada has scored 43 goals in his 104 caps, making him their joint-record scorer.
Bruno Alves, Portugal
36-year-old centre-back Alves is four goals short of a century for his country and has scored 11 goals.
Willy Caballero, Argentina
Caballero, 36, has been a bit-part player for Man City and now Chelsea with his most memorable moment coming in the League Cup final against Liverpool while at City, when his penalty shootout heroics won his team the trophy.
Jaime Penedo, Panama
The 36-year-old keeper has 129 caps for Panama going into the World Cup. Penedo now plays for Romanian side Dinamo Bucharest.
Blas Perez, Panama
Blas Perez, 36, is the joint scoring record holder for Panama, notching 43 goals in his 113 caps so far.
Felipe Baloy, Panama
Defender Baloy, 37, has just over 100 caps for his country so far, scoring just three times.
Jose Corona, Mexico
The 37-year-old plays for Mexican club Cruz Azul, where he is their club captain and has 52 caps for his country.
Tim Cahill, Australia
The 38-year-old enjoys hero status with an impressive record for his national team, scoring 50 goals from his 106 caps so far.
Sergei Ignashevich, Russia
Ignashevich, who turns 39 next month, has been a stalwart for the Russian national team for over 15 years, winning 123 caps for Russia during that time.
Rafa Marquez, Mexico
39-year-old Rafa Marquez is widely regarded as one of the best Mexican footballers of all time who now plays for Mexican side Atlas.
Essam El-Hadary, Egypt
Essam El-Hadary is the oldest player at Russia 2018 World Cup at the age of 45. The goalkeeper has 158 caps for his country.