Pope Francis now has more than 37 million followers of his nine-language account on Twitter, a Vatican monitoring website reported on Monday.
The pope's tweets in Spanish are the most popular with 13,728,000 followers, against 12,428,000 in English and 4,544,000 in Italian according to the Il Sismografo website.
The @pontifex account gained two million followers since 14 July when 35 million were recorded, Il Sismografo reported.
Pope Francis sent his first tweet on 12 December 2012 which was re-tweeted by thousands of users almost immediately.
