Extremist preacher Anjem Choudary has applied for permission to appeal his conviction for drumming up support for Islamic State, the Judicial Office said.
Choudary was sentenced to five and a half years in prison after pledging allegiance to Isis online and encouraging others to do the same.
He was convicted alongside his accomplice Mohammad Mizanur Rahman, he received the same sentence.
The judge at the trail accused Choudary of being calculating, dangerous and remorseless, and clearly having an influence due to his vast and loyal social media following.
Choudary was the linchpin of terror network Al-Muhijaroun, and there has been speculation that the group will collapse without him.