'Looper' star Emily Blunt is pregnant with her first child.

The 30-year-old actress and husband John Krasinski - who wed in July 2010 in Como, Italy, - are currently living in Los Angeles where they will presumably raise the child, and are delighted about the joyous news.

A source told Us Weekly magazine: ''They both want kids, it's one of the reasons they got a bigger place, in a neighbourhood that you can raise a family. They both couldn't be more excited.''

The couple were last spotted arriving back in America after a trip to London almost a fortnight ago.

Emily was wearing a baggy jumper and purple harems while her John donned a baseball cap and jeans.

The pair have been discussing starting a family for a while now.

She previously said: ''We want to have children, I just don't know when yet. 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.''