Older brother of pop singer Jade Thirlwall, who rose to fame as a member of the all-girl group Little Mix.
His sister has tagged him in Instagram posts and paid tribute to him on his birthday.
He and his sister are very close and she has even called him her idol.
He was born to parents James and Norma Thirlwall in South Shields, England.
His sister briefly dated musical Sam Craske from the band Diversity.
Latest information about Karl Thirlwall updated on May 07, 2021.