The man accused of the Finsbury Park attack in June has pleaded not guilty to murder and attempted murder.
Darren Osborne, 48, is accused of deliberately driving a hired van into worshippers near the Muslim Welfare House in north London.
One man, Makram Ali, was killed and 11 other people were injured.
Mr Osborne, from Cardiff, appeared via video-link from Belmarsh prison in south-east London.
It was the first time he has been asked to answer the charges against him.
Speaking in a clear voice, he pleaded not guilty to murdering Mr Ali, 51, and not guilty to attempting to murder others at the junction of Seven Sisters Road and Whadcoat Street in Finsbury Park.
His trial will start on 22 January at Woolwich Crown Court.