The Duchess of Cambridge attending a dinner for the Anna Freud National Center for Children and Families has returned to be more active in fulfilling her royal duties.

Pregnant Kate Middleton stunned in a floor-length black Diana Von Furstenberg dress at the AFNCCF gala dinner at Kensington Palace this evening. 

And the Duchess of Cambridge proved she has a lot in common with her potential futher sister-in-law as she was wearing a longer version of the dress once Meghan Markler once stepped out in.

Probably unbeknown to her, Meghan also stepped out in a shorter version of the same dress in February 2012 at the Pacific Design Center in West Hollywood, California, to an event encouraging tolerance and acceptance.

Interest in Meghan's fashion has already grown since her relationship with Harry became public just over a year ago. Like Kate, she now also has Twitter accounts dedicated to following her life and style.

But the 36-year-old actress has closed down her own lifestyle blog The Tig and limitted her red carpert appearances since her relationship with Harry became serious.

The pair have now been dating for around 18 mouths and it is understood Meghan will not renew her contract with the US legal drama paving the way for her to move to London and be with Harry.

Friends expect them to become engaged soon with a wedding next year highly anticipated.