Monaco's newborn royals, Princess Gabriella and Crown Prince Jacques Honore Rainier, posed for their first official photos with their parents, Prince Albert and Princess Charlene. The twins were born Dec. 10, 2014. 
Princess Charlene of Monaco and Prince Albert II of Monaco welcomed twins Crown Prince Jacques Honore Rainier and Princess Gabriella Therese Marie in December 2014. The couple married in 2011. Prince Albert, Monaco's reigning monarch, is the son of Prince Rainier and Princess Grace, who was formerly known as Hollywood actress Grace Kelly. 
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Britain's Prince Philip, Duke of Edinburgh, and Queen Elizabeth II have been married since 1947. Her coronation was held in June 1953 at Westminster Abbey. 
Charles, Prince of Wales and heir to the throne of Queen Elizabeth II, speaks to guests during a reception to celebrate the 21st anniversary of Duchy originals products at Clarence House on September 11, 2013, in London. 
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Brunei's Crown Prince Al-Muhtadee Billah Bolkiah and his new bride, Sarah, pray during their wedding banquet at the Nurul Iman Palace in Bandar Seri Begawan in September 2004. 
Cambodia's King Norodom Sihamoni succeeded his father, who had retired, in 2004. In the years before taking the throne, the king served as a professor of classical dance and artistic director of a ballet company, among other positions, according to his website. 
Queen Margrethe II of Denmark, seen here with her husband, Henrik, Prince Consort, succeeded her father on the throne in 1972. 
Prince Frederik, seen here with his wife, Princess Mary, is the heir to the throne of Denmark. 
Japan's Emperor Akihito and Empress Michiko married in 1959. He became emperor in 1989. 
Prince Naruhito, seen here with his wife, Princess Masako, is heir to the imperial throne of Japan. 
Jordan's King Abdullah and Queen Rania on March 12, 2013, in Amman. 
Sheikh Sabah Al-Ahmad Al-Jaber Al-Sabah has been Emir of Kuwait since 2006. 
King Letsie III, seen here with Queen Masenate Mohato Seeiso, has twice become king of Lesotho -- first in 1990, when his father fled the country for five years, and again in 1996 after his father's death. Then-South African President Nelson Mandela spoke at the king's 1997 coronation. 
Prince Hans-Adam II of Liechtenstein and Princess Marie-Aglae married in 1967. The prince assumed the regency of the small European nation in 1989. 
Grand Duke Henri and Grand Duchess Maria Teresa of Luxembourg married in 1981. The grand duke has reigned since 2000. 
King Mohammed VI of Morocco sits with his wife, Princess Lalla Salma, at the royal palace on July 13, 2002, in Rabat, Morocco. 
King Willem-Alexander, seen here with his wife, Queen Maxima, succeeded his mother on the throne of the Netherlands. His mother, Princess Beatrix, was Queen of the Netherlands from 1980 to 2013, when she abdicated. 
King Harald V of Norway and his wife, Queen Sonja, married in 1968. 
Crown Prince Haakon of Norway is shown here with his wife, Princess Mette-Marit; son, Prince Sverre Magnus; daughter, Princess Ingrid Alexandra; and stepson, Marius Borg Hoiby. 
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Qatar's Emir Sheikh Tamim bin Hamad Al-Thani took over leadership of the Persian Gulf nation in 2013 after the abdication of his father. 
Saudi King Abdullah bin Abdulaziz al-Saud speaks before a meeting with U.S. Secretary of State John Kerry at his private residence in 2014. 
Juan Carlos I reigned as King of Spain for 39 years until abdicating in favor of his son in June 2014. Juan Carlos, second from left, is seen here with his wife, Queen Sofia, son, the new King Felipe, and daughter-in-law, the new Queen Letizia. 
King Felipe VI of Spain and Queen Letizia of Spain 
Mswati III was crowned Ngwenyama, or King, of Swaziland in 1986, when he was 18. He is shown here at the White House in 2014 with Inkhosikati, or Queen, LaMbikiza, one of his 15 wives. 
King of Sweden Carl XVI Gustaf and Queen Silvia attend the 2014 Nobel prize award ceremony at the Stockholm Concert Hall on December 10, 2014. 
Crown Princess Victoria of Sweden attends the Nobel Prize Awards Ceremony at Concert Hall on December 10, 2014, in Stockholm. Princess Victoria is heir to the throne held by her father. 
Key members of Thailand's royal family -- King Bhumibol Adulyadej (from left), Crown Prince Maha Vajiralongkorn and Queen Sirikit -- in 1999. 
In the Pacific Island nation of Tonga, Crown Prince Tupouto'a 'Ulukalala, left, and his bride, Sinaitakala Tu'imatamoana 'i Fanakavakilangi Fakafanua, leave church after a wedding ceremony in Nuku'alofa on July 12, 2012. (CNN) -- You can tell them apart by the color of their onesies, pink and blue.
Monaco's newborn royals, Princess Gabriella and Crown Prince Jacques Honore Rainier, posed for their first official photos with their parents, Prince Albert and Princess Charlene.
The photos were released Tuesday on the royal family's official Facebook account. They were taken at the Princess Grace Hospital, where the twins were born on December 10.
Monaco welcomes royal twins "A beautiful Christmas gift to Monaco, friends of the Principality of Monaco and the royal family," said the post.
Royal twins born in Monaco
The twins are the first children born to Charlene Wittstock, the former South African Olympic swimmer who married Prince Albert II in 2011.
Even though Jacques was born two minutes after his sister, he will be next in line for the throne under Monaco law.
Prince Albert also has two children born out of wedlock in 1992 and 2003.
