Mother, María del Carmen Fernández González was a hairdresser.
José Luis Casillas, the father, worked for the Ministry of Education
He lived for several years in the Basque Country as a child but has always considered Madrid as his hometown, closest to his heart.
The football gene runs in the family with his 7 year younger brother Unai, playing for the CD Móstoles.
It is rumored that he forgot to put his father's predictions for the football matches one time when he was young. His father nailed all the scores and they were about to win €1.2m. However it seems that he fully made up for that mistake.
In 2000, he became the youngest goalkeeper to play in a Champions League final in the match of Real Madrid vs. Valencia (3-0), when he was just 19.
Has been in a relationship with Sara Carbonero since 2009, with whom he has a son, Martin, born in 2014.
Casillas began his youth career with Real Madrid in 1990
After gaining promotion to the senior team in 1999, he remained with the club for sixteen seasons, later serving as the club's captain
During his highly successful time at the Madrid club, he won five La Liga titles (2000–01, 2002–03, 2006–07, 2007–08, 2011–12), two Copa del Rey titles (2010–11, 2013–14), four Supercopa de España titles (2001, 2003, 2008, 2012), three UEFA Champions League titles (1999–2000, 2001–02, 2013–14), two UEFA Super Cups (2002, 2014), two Intercontinental Cups (1998, 2002), and the FIFA Club World Cup (2014)
With 725 appearances for the club, Casillas is Madrid's second most capped player of all-time after Raúl
Casillas debuted for the Spanish national team in June 2000 at the age of 19
To date he has made a national record 167 appearances, making him the fifth-most capped male footballer in history and the most capped European player
He became the nation's first choice goalkeeper at the 2002 FIFA World Cup and went on to play at UEFA Euro 2004 and the 2006 FIFA World Cup
In 2008, he was made captain of the Spanish team, leading them to their first European Championship in 44 years by winning Euro 2008
Under Casillas's captaincy, Spain went on to win its first ever World Cup in 2010 and retain the European Championship in 2012
At the 2014 World Cup, Casillas and teammate Xavi joined Andoni Zubizarreta and Fernando Hierro in representing Spain at four World Cups
Having won the IFFHS World's Best Goalkeeper Award for a record five consecutive years, Casillas is considered as one of the greatest goalkeepers of all time, placing second behind Gianluigi Buffon in both the IFFHS Best Goalkeeper of the past decade and quarter-century awards in 2010
Nicknamed "San Iker" ("Saint Iker") for his ability to produce spectacular saves, in his prime he was an athletic keeper, known in particular for his outstanding speed, agility, reflexes, consistency and shot-stopping, as well as his positioning, concentration, penalty-saving and leadership
Casillas was nominated for the European Footballer of the Year award in 2008, ranking fourth overall
At the end of 2012, he was voted into the UEFA Team of the Year for a record sixth consecutive time; he also holds the record for most appearances by a goalkeeper in the FIFPro World XI
As of 2011, Casillas is one of a very select group of players who have won all major club and national championship titles
On 19 October 2010, he became the goalkeeper with most appearances of all time in the Champions League and in November 2011, he became the most capped player of all time for the Spain national team
In September 2015, he became the player with the most appearances in the UEFA Champions League
With 167 caps for the national team, Casillas is the third captain in football history to lift the World Cup trophy, the Champions League trophy and the European Championship trophy, after Franz Beckenbauer and Didier Deschamps