Exhibit shows Queen Elizabeth's light side

Monday is the 60th anniversary of the day Queen Elizabeth II became Britain's monarch.

The big celebrations marking the queen's Diamond Jubilee don't really kick off until summer, but starting Saturday at Windsor Castle, a photo exhibit shows the stoic figure at work and at play.

The exhibit has 60 candid photos for her 60 years on the throne, showing the world's most famous monarch in a very different light.

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Royal commentator Victoria Mather said of the collection, "What's very distinctive ... is there are so many pictures of (a) smiley queen."

Many of the smiling snapshots were taken of the queen with her husband, Prince Phillip, by her side.

The photos feature a big focus on family, including the proud moment when Prince William graduated from Sandhurst Military Academy, and appears to stifle a laugh.

In another photo of the queen with her arms outstretched at Epsom Derby, there's no reserve from the monarch as her horse runs toward the finish line.

"Isn't that amazing," Mather said of the photo. "We always think of the queen as being very measured and very unspontaneous and every detail is thought out, and (in this photo) there's this fantastic 'yes!"'

Also in the collection is an early, more formal, photo of the queen during a state visit by President John F. Kennedy and Jacqueline Kennedy. Another photo shows a casual queen riding alongside President Reagan on the castle grounds.

However, the collection is lacking one face: Prince William's new bride, Catherine, the Duchess of Cambridge, commonly known as Kate Middleton. The curator of the collection told CBS News why not even one photo of the wedding is included, saying, "We're exhibiting the queen here, not Kate. (As) absolutely delightful as she is and how wonderful the wedding was, this exhibition is the queen."

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For more on the exhibition and the photos featured in it, click on the video in the player above.