The littlest royals

Prince Jacques and Princess Gabriella, born Dec. 20, 2014
Son and daughter of Prince Albert II and Princess Charlene of Monaco.

Prince Albert II of Monaco and his wife, Princess Charlene, hold their twins, Prince Jacques and Princess Gabriella, as they stand at the Palace Balcony during the official presentation of the newborn royals in Monaco on Jan. 7, 2015.

Britain

Prince George of Cambridge, born July 22, 2013
Son of Prince William and Kate, Duchess of Cambridge.

A photograph taken in London on July 2, 2014, to mark Britain's Prince George's first birthday, shows Prince William and Kate, Duchess of Cambridge, with George during a visit to the Sensational Butterflies exhibition at the Natural History Museum in London.

Spain

Princess Leonor, born Oct. 21, 2005
Princess Sofia, born April 29, 2007
Daughters of King Felipe and Queen Letizia of Spain.

King Felipe VI, Queen Letizia and daughters Princess Leonor, right, and Princess Sofia of Spain pose for photographers at the Marivent Palace on Aug. 5, 2014, in Palma de Mallorca, Spain.

Norway

Princess Ingrid Alexandra, born Jan. 21, 2004
Prince Sverre Magnus, born Dec. 3, 2005
Children of Prince Haakon and Princess Mette-Marit of Norway.

Norway's Crown Princess Mette-Marit, Prince Sverre Magnus, Crown Prince Haakon, Princess Ingrid Alexandra and Marius Borg Hoiby look at parading children during celebration of the Norwegian constitution day outside the Royal residence Skaugum on May 17, 2014. (Hoiby is Princess Mette-Marit's son from a previous relationship. He does not have a royal title.)

Netherlands

Princess Catharina-Amalia, born Dec. 7, 2003
Princess Alexia, born June 26, 2005
Princess Ariane, born April 10, 2007
Daughters of King Willem-Alexander and Queen Maxima of the Netherlands.

Queen Maxima, King Willem-Alexander, Princess Alexia, Princess Catharina-Amalia and Princess Ariane of The Netherlands attend King's Day on April 26, 2014, in Amstelveen, Netherlands.

Sweden

Princess Estelle, born Feb. 23, 2012
Daughter of Princess Victoria and Prince Daniel of Sweden.

Crown Princess Victoria of Sweden and Prince Daniel, Duke of Vastergotland, attend a photocall on Princess Estelle's first day at pre-school on Aug. 25, 2014, in Stockholm, Sweden.

Luxembourg

Princess Amalia of Luxembourg, born June 15, 2014
Daughter of Prince Felix and Princess Claire of Luxembourg.

Prince Felix and Princess Claire of Luxembourg pose with their daughter, Princess Amalia of Luxembourg, after her christening ceremony at the Saint Ferreol Chapel in Lorgues on July 12, 2014, in Lorgues, France.

Japan

Princess Aiko,born Dec. 1, 2001
Daughter of Prince Naruhito and Princess Masako of Japan.

Japan's Princess Aiko, center, accompanied by her parents, Crown Prince Naruhito and Crown Princess Masako, answers a reporter's question as they attend her entrance ceremony at the Gakushuin Girls' Junior High School in Tokyo on April 6, 2014.

Denmark

Prince Christian, born Oct. 5, 2005
Princess Isabella, born April 21, 2007
Prince Vincent and Princess Josephine, born Jan. 8, 2011
Children of Prince Frederik and Princess Mary of Denmark

Princess Mary of Denmark, Princess Josephine of Denmark, Princess Isabella of Denmark, Crown Prince Frederik of Denmark, Prince Vincent of Denmark and Prince Christian of Denmark meet the press, whilst on skiing holiday on Feb. 14, 2014, in Verbier, Switzerland.

Belgium

Princess Elisabeth, born Oct. 25, 2001
Prince Gabriel, born Aug. 20, 2003
Prince Emmanuel, born Oct. 5, 2005
Princess Eleonore, born April 16, 2008
Children of Prince Philippe and Princess Mathilde of Belgium.

Prince Gabriel, Crown Princess Elisabeth, Queen Mathilde of Belgium, Princess Eleonore, King Philippe of Belgium and Prince Emmanuel attend the Car Free Day on Sept. 21, 2014, in Brussels, Belgium.