The footballer shared a photo of himself and Eric Cantona during their time at Manchester United in an Instagram post which has been liked over 50,000 times in 15 minutes.
While the 41-year-old said that Britain will always be "great" whatever the result of Thursday's referendum, he chose to give his view on the debate.
"We live in a vibrant and connected world where together as a [sic] people we are strong. For our children and their children we should be facing the problems of the world together and not alone.
"For these reasons I am voting to Remain."
Beckham also touched on his time playing for various European clubs including Real Madrid and Paris Saint-Germain, saying: "Those great European cities and their passionate fans welcomed me and my family and gave us the opportunity to enjoy their unique and inspiring cultures and people."
He also paid tribute to his fellow European former teammates such as Cantona, Peter Schmeichel and Roy Keane.
Shortly after Beckham's post, the Prime Minister said he was "delighted" the sportsman had backed remain.
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