That compared with its initial "preliminary flash" figures of 0.6 and 1.6 percent on April 29 and subsequent downward cut in its flash estimate to 0.5 and 1.5 percent on May 5.
The rate of growth matched the level in the first quarter of 2015, a pace only surpassed at the start of 2011, when the euro zone economy raced ahead at 0.9 percent.
The greatest contributions to overall euro zone GDP were household spending and private sector investment. Inventory changes and public sector spending were also positive, but imports increased by more than exports.
Quarter-on-quarter growth was at a healthy 0.7 percent in Germany, the euro zone's largest economy, 0.6 percent in France and 0.3 percent in Italy.
The only euro zone nation suffering contraction was Greece, whose economy shrank by 0.5 percent. There were no figures provided for Ireland, Luxembourg and Malta.