The Great Gatsby star and Mumford & Sons frontman are preparing to welcome a little one to their family later this year (15), sources tell Us Weekly.

The news emerges the day after the couple attended the 2015 Tony Awards in New York City on Sunday (07Jun15), when Mulligan lost out on the Best Leading Actress in a Play award to fellow Brit and The Queen star, Dame Helen Mirren.

The 30 year old walked the red carpet wearing a strapless dark crimson gown, which appeared to be a little loose-fitted to cover her growing belly, fuelling rumours she is pregnant.

Mulligan and Mumford tied the knot during a rustic countryside ceremony in Somerset, England in 2012.