The Five-Year Engagement star confessed that she finds it hard to speak about her marriage because there's so much at stake.
"This is what I find difficult about talking about my marriage - it's hard to sum up something that's so vital and means everything to you in a sound bite," Blunt told Manhattan.
"Do you know what I mean? All I can say is that it's an effing blast. It's just great, and I'm so happy."
Blunt went on to open up about the possibility of having children in the future.
"We want to have children; I just don't know when yet," she said. "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."
In May 2011, Krasinski revealed that they have no plans to start a family just yet, though he confirmed that they both want children.
Blunt and Krasinski married in July 2010 in a ceremony in Italy.
Watch a trailer for The Five-Year Engagement below: