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Kate Middleton and Prince William on the day of their graduation ceremony at St Andrew's University in St Andrew's on June 23, 2005 in ScotlandMiddleton Family/Clarence House via GettyImages

Prince William, Duke of Cambridge, is the second in line to the throne and is celebrating his 34th birthday today (21 June). The keen football fan awoke in France after watching England's draw with Slovakia in Saint-Etienne. He is spending the first part of his birthday travelling back to the UK, it has been reported.

William is expected to spend the rest of the day in private after being reunited with his family, including his wife, the Duchess of Cambridge, and his two children, Prince George, 2, and Princess Charlotte, 1. Royal watchers have seen William evolve from a young heartthrob prince into an RAF Search and Rescue pilot, and then a family man, a dedicated husband and father.

William first met Kate Middleton while studying art history at St Andrews, and the pair became friends before embarking on a relationship in 2003. Though it was reported in 2007 that the couple had split, they subsequently rekindled their relationship and Middleton joined William on holiday and the royal family at public events.

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Prince William and Kate Middleton pose for photographs in the State Apartments of St James Palace on November 16, 2010 in London, EnglandChris Jackson/Getty Images

Clarence House announced in November 2010 that the pair were to marry, having gotten engaged in Kenya in October. William gave Middleton an engagement ring that belonged to his mother, the late Diana, Princess of Wales. The wedding took place on 29 April 2011 in Westminster Abbey whereby Middleton wore a custom-made wedding dress by Sarah Burton for Alexander McQueen.

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Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge kiss on the balcony of Buckingham Palace after getting married on April 29, 2011John Stillwell - WPA/Getty Images

After a year of wedded bliss, the royal couple declared they would be parents for the first time in December 2012. Middleton gave birth to their son, Prince George, on 22 July 2013 in the Lindo Wing of St Mary's Hospital – the same place William was delivered.

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Catherine, Duchess of Cambridge and Prince William, Duke of Cambridge depart the Lindo Wing with their newborn daughter at St Mary's Hospital on May 2, 2015John Stillwell - WPA/Getty Images

Just over a year from the arrival of the new prince, it was announced that Kate was pregnant with her second child in September 2014. She was admitted to the Lindo Wing once again and gave birth to a daughter, Princess Charlotte, on 2 May 2015. William was present at both births.

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Cattherine, Duchess of Cambridge and Prince William, Duke of Cambridge, with their children, Princess Charlotte and Prince George, enjoy a short private skiing break on March 3, 2016 in the French Alps, France.John Stillwell - WPA/Getty Images

William qualified as a pilot in April 2008 and served seven-and-a-half years of full-time service with the British Armed Forces until resigning in September 2013. He has since balanced being a husband and father with his royal duties.

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Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge pose for the official tour portrait for their trip to Canada and California in the Garden's of Clarence House on June 3, 2011Chris Jackson/Getty Images

Most recently, he made the breakthrough decision of being featured on the cover of gay publication Attitude.

It is understood that he has used the ground-breaking press opportunity to address the bullying of lesbian, gay, bisexual and transgender youths. The Duke has worked hard to support the fight against bullying, launching a cyberbullying taskforce to protect young people on social media, and meeting a group of LGBT people convened by Attitude magazine at Kensington Palace in May 2016.

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Prince William, Duke of Cambridge and Catherine, Duchess of Cambridge attend the second day of Royal Ascot at Ascot Racecourse on June 15, 2016Chris Jackson/Getty Images
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