Princess Eugenie and Princess Beatrice made surprising revelations in their British Vogue interview.

The next royal bride confessed to the magazine that she got into trouble recently due to oversharing. According to Princess Eugenie, she shared something on social media that was supposed to be "off-limits."

"I recently got in trouble for posting a picture of Papa in a corridor of the palace that was off-limits to the public," Princess Eugenie said (via Daily Mail).

Princess Eugenie admitted that she had a hard time choosing a photo to pay tribute to her dad for Father's Day. She found his photo in the Balmoral snap "too personal" and the Ascot snap "too formal." So, she chose the Prince Andrew's picture during his debut as Colonel of the Grenadier Guards.

The snap featured the corridor lined with marble bust and plush red carpet with paints including that of Princess Maud of Wales, Queen Victoria's granddaughter. Normally, the palace is closed off to the public, so Princess Eugenie earned a "telling-off."

In the same interview, Princess Beatrice and Princess Eugenie got candid and shared the biggest fight they had as siblings. "One of the biggest fights we ever had was about a pair of Converse trainers," Princess Beatrice said. "We have the same size feet and both of us had identical pairs. One pair got trashed and the other sister may have swapped them."

Princess Eugenie and Princess Beatrice are very close. In fact, due to their great relationship, everyone is expecting the next royal bride to choose her sister as her maid of honor. Princess Eugenie confirmed their close sister bond in the past interview.

"We get on fantastically well, perhaps because we do and think different things. I am definitely not as polite as Beatrice, I have to say. I tell it as it is. I am shyer at first," Princess Eugenie told The Telegraph. "Like, at a party I will say to Beatrice as we go in, 'Oh, you go first.' But then, when we're actually in, I am much louder and she is far more polite and solicitous."

Princess Eugenie is tying the knot with her fiancé, Jack Brooksbank, on Oct. 12 at St. George's Chapel at Windsor Castle.