They’ve been dating for three years and have two children together, it was about time Nicole Richie, 28, and Joel Madden, 30, got engaged. Richie made it public when she flashed her diamond engagement ring to photographers outside the Late Show with David Letterman Monday night.

Madden confirmed the engagement on his Twitter page. “Yep, I’m engaged," he tweeted. "Very happy. Yeah we’ve been engaged for a while so your all kind of late on that. But thanks for the hoopla all the same.” The loved-up couple, who hope to marry in the summer, dined at Manhattan’s Abe & Arthur restaurant after the show. –MANDY COHEN in London

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