Kate Middleton is in the news again after reports claim that the 33-year-old Duchess seemed to have a new opponent when it comes to popularity and it's none other than - Princess Madeleine of Sweden. Rumors have it that Prince William's wife is ridiculously jealous over the Swedish Princess' popularity.

Is Kate Middleton losing her charm as the world's most popular Royal? According to Celeb Dirty Laundry, the Duchess of Cambridge is fearing the rise of the Swedish Royal family, particularly Princess Madeleine, who's the same age with the Duchess and also has two children.

Recently, the 33-year-old Duchess of Hälsingland and Gästrikland allowed the baptism of her 3-month-old son Prince Nicolas to be aired on Swedish television. The whole country was also charmed not only by the appearance of godfather and Madeleine's brother Prince Carl Philip, 36, who is considered as one of the hottest Royals, but also with her daughter Princess Leonore, who almost stole the spotlight by her adorable dancing skills.

Due to this, Kate Middleton allegedly fears Princess Madeleine will become more popular than her. It was also reported that the Duchess of Cambridge's jealousy started in June 2013 where she ditched the Swedish Princess' wedding to British-born banker Chris O'Neill. Kate was also allegedly green with envy as Sweden's King Carl and Queen Silvia rarely interfere in Madeleine's life while the Duchess, on the other hand, gets orders from Queen Elizabeth II.

Meanwhile, Kate Middleton's husband and the father of her children, Prince William, is reportedly worried about his wife's depression and anxiety. Another Celeb Dirty Laundry article cited that the Prince might have had some heart-to-heart discussion about their marriage and other issues that are taking a toll on their relationship.

The celeb news site also added that the Royal couple appeared more loving and relaxed when they participated in the activities during World Mental Health day at Harrow College on Oct. 10.

In other news, royal style watchers are closely monitoring Kate Middleton as she is set to join Prince William and Queen Elizabeth II to attend her first ever state banquet at the Buckingham Palace in just over a week's time. The state banquet will be in honor of Chinese President Xi Jinping, which also requires Kate to wear a tiara.

Based on the royal protocol, female members of the Royal Family are clad in evening gowns and wear tiaras, which are often loaned to them by the Queen. Daily Mail also added they also display their family orders, the miniature portraits of the Sovereign set in diamonds suspended from a ribbon that are pinned to their left shoulder.

Do you think Kate Middleton is insecure about Princess Madeleine? Will the Duchess of Cambridge wear one of Princess Diana's tiaras?