Pakatan Harapan today denied that it needs former premier Dr Mahathir Mohamad to lead the opposition movement in its quest to topple Prime Minister Najib Abdul Razak.

"No. That is not right. (Dr) Mahathir is not strong. He needs our help," said Opposition Leader Dr Wan Azizah Wan Ismail at a press conference at Parliament House.

She was responding to a question that Harapan was not strong to oust Najib and needs the former premier to remove Najib.