Fadnavis said there is no situation where Uddhav Thackeray-led Shiv Sena and BJP have to part ways.
"I am 100 per cent sure. I don't think the Sena will walk out. Our government will run for five years," Fadnavis told Rajat Shamra in Aap Ki Adalat.
His comments come in wake of the rising tensions between the two allies with Shiv Sena forcing the cancellation of Pakistani ghazal maestro Ghulam Ali's concert in Mumbai.
"I don't think we have reached any serious point where we will part ways. There is no such situation at all. We had a Cabinet meeting this week attended by the Shiv Sena ministers. We also had informal meetings after that. So, please remove the notion from your mind that Uddhavji is going to announce withdrawal of support on October 22. The government is not going to fall and complete full five years term," Fadnavis said.
The Sena has been upset with the BJP ever since the break-up of its 25-year-old alliance before the state Assembly polls in October last year, following which both the parties contested individually. Although the Sena joined the government later, it has been complaining that the BJP does not give its "due-respect".