Older brother of R&B singing sensation Harvey Cantwell.
He was a soccer player growing up and would play with the Hayden Youth Senior team beginning in February of 2015.
He was much more active on Twitter with the handle olliec32 before creating his cantwellollie account. He frequently tweeted how proud he was of his younger brother in achieving so much in such a little time from his old account.
He has another brother named Elliott. His parents Nicky and Leigh worked as a counselor and printer, respectively. He began dating a girl named Hannah Finnis in January of 2011.
His brother Harvey toured alongside Perrie Edwards and the rest of Little Mix in 2014.