In 2008, he became Director of Public Prosecutions and Head of the Crown Prosecution Service.
The high-ranking barrister also fought for human rights and legal reform in both the Caribbean and Northern Ireland.
After leaving these roles in 2013, he was appointed Knight Commander of the Order of the Bath in the 2014 New Year Honours.
He advocated a second referendum on Brexit, saying he would have voted to remain.
After Labour’s defeat in the 2019 general election, he was elected to succeed Jeremy Corbyn as Labour Leader in April 2020.
In his acceptance speech, he said he would refrain from “scoring party political points” and that he planned to “engage constructively with the government”.
In his personal life, the politician married Victoria Alexander in 2007.
He told BBC Radio 4’s Today programme in 2019: “My dad worked in a factory, he was a toolmaker, and my mum was a nurse, and she contracted a very rare disease early in her life that meant she was constantly in need of NHS care.
“So, actually, my background isn’t what people think it is – I know what it’s like.
“I actually never had been in any workplace other than a factory until I left home for university. I’d never been in an office.
“So the idea that somehow I personally don’t know what it’s like for people across the country in all sorts of different circumstances is just not borne out.”
Keir Starmer will appear on Piers Morgan’s Life Stories tonight at 9pm on ITV.