He was born to a Nigerian father and English mother. Soon after his birth, his parents got divorced and his father moved to the U.S.A. He was initially raised by his mother. She had three other children; all from different fathers.
He belongs to a royal family in Nigeria. His father was a son of a King in Nigeria.
At the age of 9, he moved with his father to Nigeria, where he spent 2 years in an International School before returning to Milton Keynes to live with his mother.
He has a love for football since his childhood. He played in various tournaments in the MK City and earned many trophies.
At the age of 11, he joined the youth team of MK Dons.
His mother suffered from alcoholism, due to which, at the age of 13, he moved into the family of Alan and Sally Hickford. Though he was not legally adopted, he regards them as his “adoptive parents”.
At the age of 16, he made his debut with the first string team. He scored his first goal against Cambridge and made his league debut in a game against Coventry City in December 2012.
His good performances with MK Dons attracted many eyes from the big European clubs. In February 2015, he joined Tottenham on a five-year contract.
He scored his first goal for Tottenham against Leicester City. He ended the 2015-2016 season with a brace against Stoke City and won the PFA Young Player of the Year Award.
In 2015, he scored his first goal in the English colours on his debut start against France at the Wembley Stadium.
He also represented England in Euro 2016. Though his team suffered in the tournament and were knocked out of the tournament by Iceland.
The 2016-2017 season again was a great year for him and he even won PFA Young Player of the Year Award, the second time in two years.
He doesn’t share a good relationship with his family. After his father got remarried in his childhood, he felt abandoned; he left him and came back to England. Due to the disturbed childhood he had with his mother, he does not talk to her anymore. In 2016, he dropped his surname “Alli,” as he did not want to maintain any connection with his family.
In 2018, his goal celebrations became quite popular on social media. They were inspired by the famous video game, “Fortnite”.
In 2018, he was selected in the England squad for the 2018 FIFA World Cup.