Ben Kinsella was stabbed in Islington in June 2008
A teenage girl has told the Old Bailey she heard two youths describe how they killed schoolboy Ben Kinsella.
Ben, 16, the brother of EastEnders actress Brooke Kinsella, was stabbed 11 times after leaving a bar in Islington, north London, in June last year.
The girl, giving evidence as "Kellie", said defendants Michael Alleyne and Juress Kika discussed the attack.
Mr Kika, 19, Mr Alleyne, 18, and Jade Braithwaite, 20, all of London, deny murdering the teenager.
Giving evidence behind a curtain, Kellie said Mr Alleyne and Mr Kika made the claims at her flat.
She told the jury: "I asked Michael who was involved. Did he do it?
"First he told me to keep quiet and then he turned round and he said: 'Yer, what do you think?"'
The girl also heard Mr Alleyne allegedly discuss where the weapon had been hidden.
She added: "After watching the news, I again asked Michael did he do it," Kellie continued. "After a while, he did not want to answer my questions.
"It led to a conversation between him and Juress about how many times they had stabbed Ben."
Nicholas Hilliard, QC, prosecuting, asked: "Were they each saying they stabbed Ben?"
She replied: "Yes. I know it came up to them stabbing him a total of 11 times from what they was talking about."