The 5 best family photographs taken by Kate Middleton, according to a royal photographer

"This is a lovely family group portrait. Group shots are notoriously difficult — getting everyone's attention and persuading them to look at the camera at the same time is no easy task," Hussein told Insider.

"With children, this is all the more tricky. The Duchess of Cambridge did a great job here, not only getting them all looking natural and smiling towards her lens, but also with the composition," he added.

The photo was taken in the grounds of Anmer Hall, the family's country home in Norfolk where they have been self-isolating during the pandemic. It was released to mark Prince William's 38th birthday, which fell on Father's Day earlier this month.

"When dealing with children of different ages, alongside an adult, you have to deal with various heights," Hussein said.

"The Duchess has dealt with this by using the swing as a clever prop to bring them close to one another while staggering them in a relaxed and fun setting.

"It all helps produce an excellent photograph a professional would be very happy with," he added.

"I love this shot of Prince George holding a newly born Princess Charlotte," Hussein said.

"It's such a tender moment and really captures the pride and joy parents and an older sibling feel when a baby is born into the family.

"The Duchess of Cambridge's photo is all the better because of the way she has caught Prince George's proud smile and the way the photo clearly shows baby Charlotte's face," he added.

"The photo looks like it's taken close to a window with lovely natural, soft light coming through, a technique often employed by professional photographers."

It has become tradition for Middleton to mark her children's birthdays each year with a series of official photographs, and Prince Louis' second birthday was no different.

This image, which was taken during the coronavirus lockdown in the UK, "was significant as it showed Louis producing a rainbow-colored hand-painting for the NHS," Hussein said.

Louis followed the lead of children across the UK, who painted rainbows and placed them in the windows of their homes as a way to honor the nation's healthcare staff working during the pandemic.

"The Duchess has used a shallow depth of field and a clean background to emphasize Louis' smiling face," Hussein added.

"It's certainly a fun photo, which encapsulates the simple joys children of this age have when playing with things like paint — I'm sure things only got messier after this photo!"

"This photo by the Duchess of Cambridge really stands out because it's such a natural, warm moment between the Prince of Wales and his son, the Duke of Cambridge," Hussein said.

"While perhaps not demonstrating her technical ability as much as some of her best photographs, it more than makes up for that with its warmth, showing a great bond between a father and son.

"It's unusual to see this in a royal photograph and is the kind of candid photo you might only get when taken by another family member," he added.

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