Millie Bobby Brown, Jake Bongiovi Flaunt Rings, First Pics Since Wedding

Millie Bobby Brown and Jake Bongiovi are lookin' very newlywed ... tooling around the Hamptons and flashing their rings in the first shots of them since their reported secret wedding. The happy couple were out and about Friday doing some shopping ... and, just check out the huge grins on their faces -- they seem in a rather celebratory mood, we gotta say, while dressed in light, summery clothes. Millie's throwing…