Life just majorly changed for Kate Middleton and Prince William — they’re now a royal family-of-five! The Duke and Duchess of Cambridge welcomed their newest addition, a yet-to-be named baby boy, on Monday, April 23 and, according to a source close to the royals, Kate, 36, and William, 35, are already loving being parents to three little ones.

“It completes them. [Kate] is one of three siblings, and it’s a good family size. Boy-girl-boy is pretty cool as well,” royal biographer Ingrid Seward told People. A family friend then added, “[Parenthood] suits them really well. They are enjoying it and are very happy.”

Another source who lives in Kate’s Bucklebury, England hometown said, “Everyone around here is thrilled for them. It’s lovely that [Prince] George and [Princess] Charlotte have a little brother to play with, and [Kate’s mom Carole Middleton] will be absolutely over the moon.” A second local said they’re hopeful that the new Cambridge prince will be “able to live a little outside the limelight” because he is fifth in line for the British throne.

“We look forward to seeing him in the local park,” the insider added. As for George, 4, and Charlotte, 2, a friend of the family said the duo are “so excited” about their new little brother. “Kate’s worried that Charlotte will feel it the hardest as the youngest, but she’s such a confident little girl and growing up so fast, Kate is hoping she will adjust,” the insider shared.

View this post on Instagram

The Duke and Duchess of Cambridge are pleased to share a new photograph of their family. The image features on Their Royal Highnesses' Christmas card this year. The photograph shows The Duke and Duchess of Cambridge with their two children at Kensington Palace. It was taken earlier this year by @chrisjacksongetty Their Royal Highnesses have also announced this morning that Princess Charlotte will attend the Willcocks Nursery School in London from January 2018. The Willcocks Nursery School has said: "We are delighted that The Duke and Duchess of Cambridge have chosen the Willcocks Nursery School for Princess Charlotte. We look forward to welcoming Charlotte to our nursery in January."

A post shared by Kensington Palace (@kensingtonroyal) on

Following the new royal baby’s birth, his grandfather Prince Charles publicly gushed about the monarchy’s new addition and joked he’s having a hard time keeping up with his growing brood. “We are both so pleased at the news,” he said, referring to himself and his wife, Camilla, Duchess of Cornwall. “It is a great joy to have another grandchild, the only trouble is I don’t know how I am going to keep up with them.” Congrats to William and Kate on their new prince!

Join our Facebook group for the latest updates on Kate Middleton, Prince William, and all things royal!