On 29 January 2019 the former Empire star told police he had been attacked in a racist and homophobic incident.
In February that year he was charged with filing a false police report, but the actor says he is innocent.
All charges against him were dropped in March, but a special prosecutor pursued the case.
Smollett was later charged with six counts of lying to police, to which he pleaded not guilty.
Why was he in court this week? Smollett appeared at the closed hearing to decide whether his lawyer should be disqualified from representing him in the ongoing trial .
It wasn't related to any of the charges against him. Previous hearings in 2020 and 2021 have taken place online during coronavirus restrictions.
He is currently represented by lawyer Nenye Uche. Two men, Abel and Ola Osundairo, are who Chicago police have said Smollett paid to carry out the attack.
Smollett claims he was beaten, had an "unknown chemical substance" poured on him, was called racist and homophobic slurs and had a rope put around his neck in the attack.
The Osundairo brothers, who were set to testify against Smollett, claimed that Uche had spoken with them in 2019 about representing them.
Their attorney, Gloria Schmidt Rodriguez says that the brothers' phone records from the time can't be found.
Radio 1 Newsbeat has contacted Cook County State's Attorney for more details.
Flood traps: 14 people trapped in a tunnel in China's Guangdong Province
Labour Force Australia: Australian unemployment declines to Ten-Years’ low
New Zealand suspends quarantine free travel with Australia's Victoria state
Kerala Higher Education Dept launches skill training courses on 'World Youth Skills Day'