Kate, who recently celebrated her 31st birthday, stepped out in a Whistles frock and black belt to see her first official portrait unveiled at the National Portrait Gallery. She was accompanied by husband Prince William.
Rake slim Kate's teeny, tiny bump was just visible as she toured the gallery and saw her portrait by Paul Emsley.
Kate was heard telling the artist she thought the portrait was 'just amazing!' Well, she's not going to say 'gosh you made me look really old', is she?
This is the second time Kate has been out and about since she left hospital after suffering hyperemesis gravidarum – extreme morning sickness.
She made a brief appearance at the BBC Sports Personality of the Year Awards before Christmas, but has been keeping a low profile as her pregnancy progresses.
Kate is believed to be just past the 12 week mark in her first pregnancy.