Russian President Vladimir Putin has formally divorced his wife Lyudmila after more than 30 years of marriage, Kremlin spokesman said on Wednesday, following a surprise breakup announcement last year.

"The divorce has taken place," Dmitry Peskov said, without giving any further details.

Putin and his wife announced that their marriage was over last June in a live broadcast on Russian state television, confirming longstanding speculation that they had separated.

The Kremlin made clear at the time that their breakup had yet to be formalised.