Prince George and Princess Charlotte meet their new brother!

Prince George and Princess Charlotte finally get to meet their new little brother!

Prince William arrived with George, 4, and Charlotte, 2, at the Lindo Wing of St. Mary's Hospital on Monday afternoon. George looked dapper as ever in his St. Thomas's Battersea uniform while Charlotte was wearing a baby blue dress with a navy cardigan. The 2-year-old princess adorably waved to the cameras several times.

The father of three left shortly after 4 p.m. London time to pick up his two older children.

"Back in a minute," a smiling William told reporters.

Prince William and Duchess Kate's new bundle of joy was born late Monday morning, according to a statement by Kensington Palace. Britain's newest prince weighed 8lbs and 7oz, making him the heaviest royal baby to be born in over 100 years.

"Her Royal Highness The Duchess of Cambridge was safely delivered of a son at 1101hrs," the announcement read. "The baby weighs 8lbs 7oz. The Duke of Cambridge was present for the birth. Her Royal Highness and her child are both doing well."

According to bookies, Arthur, Albert and Philip are top contenders for the new prince's name. The name Philip pays tribute to Prince William's grandfather Prince Philip.

For more on Kate and William's big day, watch the video above!

See photos from the big day!