After Prince William and Kate Middleton married, they were often paired with Prince Harry at official functions, making them look like the Three Musketeers, but apparently things were not as smooth as they appeared.

In fact, royal author Tina Brown, in her book "The Palace Papers," claims that Harry felt left out when William married.

"Even though they were still incredibly close, living next door to each other (at Kensington Palace), sharing the same office, and often visiting each other, ...... [Harry] lamented his world-warring bond with William," Brown wrote (via Express).

"Harry felt alienated by the boogie family structure and could not understand his brother's attachment to his in-laws.

"The world of Bucklebury (the Middletons' home) bored Harry.

For Harry, in Brown's words, "[William and Kate] were tight-knit, and William had become [a Windsor countryman]."

In "Spare," Harry calls Kate "the sister I've never had and always wanted," but he also admits that his relationship with William was not always idyllic as he grew up.

These days, of course, Harry is essentially estranged from William and Kate, largely due to Harry's bombshell in a 2021 Oprah interview and his shocking confession in his memoir, Spare, released in January 2023.

I certainly hope they can make up in the future, but unfortunately that doesn't seem to be the case right now.