The pair secretly tied the knot last October and now a rep for the couple told Us Weekly that Evan and Jamie are "thrilled" to be expecting their first child.
The lovebirds first met in 2005, when they costarred together in Green Day's Wake Me Up When September Ends video - how romantic. After splitting in 2006, they reunited in Summer 2011.
So who else is expecting a little bundle of joy?
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