Prince William and Kate Middleton
SWANSEA, WALES - SEPTEMBER 27: Prince William, Prince of Wales and Catherine, Princess of Wales leave St Thomas Church, which has been has been redeveloped to provide support to vulnerable people, during their visit to Wales on September 27, 2022 in Swansea, Wales. Chris Jackson/Getty Images/IBTimes

Despite initial resistance from the Prince of Wales, Kate Middleton and Prince William are considering having a fourth child.

Sources told Us Weekly Princess Kate, who shares Prince George, 9, Princess Charlotte, 7, and Prince Louis, 4, with Prince William, managed to convince her husband to have another baby.

"Kate has been talking about wanting another baby for a while now," an insider told the outlet. "She has always wanted four children, and while William was originally happy with three, she has managed to twist his arm."

After Kate gave birth to the couple's third child, Prince William often seemed against the idea of a fourth baby during public appearances.

When the couple attended an event in February, Middleton noted that her husband wasn't thrilled anytime she spent time around babies since she becomes "very broody" afterward.

"William always worries about me meeting under 1-year-olds," Princess Kate said at the time. "I come home saying, 'Let's have another one.'"

Since Middleton has persuaded Prince William to expand their family, those close to the couple believe the Princess of Wales could become pregnant with another royal baby within the next few months.

"[Their pals] wouldn't be surprised if we'll be hearing an announcement early next year," the insider said.

News that the couple could announce a fourth child comes as they continue the transition into their new titles as Prince and Princess of Wales following the death of Queen Elizabeth II.

"William's years of being mentored by his grandmother and his father have really paid off because the transition to Prince of Wales has been seamless," said author Katie Nicholl.

"Kate has also effortlessly moved into a role with so much weight and history and is already making it her own."

Next up, Middleton and Prince William are expected to travel to Boston in December to attend the Earthshot Prize Innovation Summit. The trip will mark the couple's first visit to the United States in eight years.

Kate Middleton married Prince William in 2011