The soon-to-be mom of two, 33, recycled the elegant Hobbs coat (which cost around $250 when she bought it back in 2013), having previously worn it to the christening of the Royal Princess cruise ship when pregnant with Prince George in June 2013.
Unlike in 2013, the Duchess of Cambridge did not wear a matching hat, instead opting to tie her long, dark tresses back into a smart ponytail, keeping her hair tidy despite the coastal sea breeze.
Under her animal print coat, the seven-months pregnant Princess wore a plain black shift dress. She accessorized her look with Annoushka earrings, a Mulberry clutch, and a pair of black Stuart Weitzman pumps.
Duchess Kate arrived at the Kent art gallery at 10:25 a.m. where she met officials and well-wishers before going inside the building to view the "Self: Image and Identity" exhibition.
Prince William's wife is making the visit in her capacity as Patron of the UK's National Portrait Gallery. The exhibit includes the last self-portrait by Sir Anthony Van Dyck, recently acquired for the nation by the National Portrait Gallery through a public appeal with The Art Fund.
In addition to meeting the contemporary artists whose work features in the exhibition, the Duchess is expected to meet local school children, working with Turner Contemporary on an art project of their own.
Later today the pregnant Royal will visit Resort Studios in Cliftonville, Margate, which is a collective of local creative professionals. The Duchess will be able to indulge her love of art by viewing an exhibition featuring photomontages of local personalities and meeting artists in residence to hear about their work with local communities.