By Robyn Ross,
Blunt, 30, and Krasinki, 33, have been open about their desire to start a family since their 2010 wedding in Italy.
"We want to have children; I just don't know when yet," Blunt told Manhattan magazine last year. "I'm just not sure about the timing of all of that. We're both from big families, so I think it's something we want."
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