Sebastian Edward Pearson is the second child of Simon Pearson and the fourth child of Mette Pearson. He was born 14 November 2002. He has younger brother Benjamin from 2004, Alexander from 2006, and younger sisters fraternal twins Clara and Ellen from 2007, older half-sisters Emilie George from 1990 and Mathilde Reyn from 1994, older half-brothers Emil from 1996 and Samuel Ravn Walsh from 1999.
In September 2005, when he was 2, he started Sevenoaks Prep in nursery. He continued to attend Sevenoaks until age 13.
In 2016, when he was 13, he was admitted into Tonbridge School in Year 9.
In 2017 he will do GCSEs in English language, English literature, Maths, Biology, Chemistry, Physics, Spanish, Mandarin, History, and Latin.