A very pregnant looking Jennifer Garner stepped out dressed up as a dog with daughter Violet for Halloween.

The mum-to-be and her eldest tot got into the trick-or-treat spirit wearing matching t-shirts that read 'Ted' and 'Fred.'

The pair got their costume ideas from the Big Dog Little Dog book series.

The Juno actress is expecting her second child with husband Ben Affleck.

The family have been making the most of their trip to New York by stopping at Childrens museums and shopping in Soho.

See a dressed-up Jen below