Bey gave the world a really good look at the twins, Sir and Rumi, with a super happy pic. Jay-Z and Beyonce kicked off the U.S. leg of their On the Run II Tour in Cleveland Wednesday night, but based on what they're wearing ... this looks like a shot from their mega yacht last week.

The twins, who turned one last month, don't get nearly as much camera time as their big sis, Blue Ivy ... but, Mom obviously wanted to let 'em have their shine.