UK Prime Minister Boris Johnson is expected to be the chief guest at 2021 Republic day.British Prime Minister Boris Johnson is expected to be the chief guest at India’s 2021 Republic Day celebrations. If Johnson accepts the reported invitation, he will be the fifth leader from Great Britain to be the chief guest at the Republic Day event. Prime Minister Narendra Modihad reportedly invited British Prime Minister Boris Johnson during a telephonic conversation between the two on November 27.