Peter I ([ˈpʲɵtr ɐlʲɪˈksʲejɪvʲɪt͡ɕ]; Russian: Пётр I Алексеевич, romanized: Pyotr I Alekseyevich; [note 1] 9 June [O.S. 30 May] 1672 – 8 February [O.S. 28 January] 1725), was Tsar of all Russia from 1682, and the first Emperor of all Russia, known as Peter the Great, [note 2] from 1721 until his death in 1725. He reigned jointly with his half-brother Ivan V until 1696.