Kate Middleton joined the Queen of England and Prince Philip for a visit to Baker Street Underground station to mark the 150th anniversary of the London tube today. She wore a teal coat and a black James Lock hat as she made the official visit with Prince William's grandfather and grandmother, who was making her first appearance since recovering from her illness earlier this month. Kate reportedly told officials that she used to take the subway quite often in pre-Duchess days. She said, "I used to travel on the tube on a regular basis." One official gave her a "Baby on Board" pin, which she promised to wear home.
Kate has had a busy week filled with royal duties. She stopped by the Child Bereavement offices in Buckinghamshire with Prince William yesterday and attended a St. Patrick's Day parade on Sunday. Her work isn't over just yet, as she will stop by a volunteer training day at the Great Tower Scout Camp on Friday.