Princess Astrid and Prince Lorenz have five children, who bear the title "Prince/Princess of Belgium" (in each of the three official languages) as members of the Belgian royal family and Archduke/Archduchess of Austria:
Astrid was formerly President of the Belgian Red Cross, a position which ended on 31 December 2007. She declined to stand again for election to the role in light of internal struggles in the organization in reconciling its French-speaking and Flemish branches, each of which seeks greater autonomy. The princess is also a colonel in the Medical Component of the Belgian Armed Forces. Her official residence is the Royal Palace of Laeken in Brussels.
Upon her brother's ascension to the throne, Princess Astrid will take on some duties previously conducted by Philippe as the Honorary chairman of the board of the Foreign Trade Agency with his wife, Queen Mathilde. Princes Astrid will then fulfill international trips to Angola, South Africa, India and Russia to promote Belgian trade.
Her Royal Highness Princess Astrid of Belgium (1962–present)
Her Imperial and Royal Highness Princess Astrid of Belgium, Archduchess of Austria-Este (1984–1996)
Her Imperial and Royal Highness Princess Astrid of Belgium, the Archduchess of Austria-Este (1996–present)
She has held the title "Princess of Belgium" from birth under Belgian law. As wife of the Archduke of Austria-Este, internationally or depending on the situation, she is also accorded the traditional title "Archduchess of Austria-Este" or, more formally, is addressed as HI&RH Princess Astrid of Belgium, Archduchess of Austria-Este.
Her children by Archduke Lorenz bear the titles "Prince(ss) of Belgium" by Belgian decree of 2 December 1991, in addition to their Austrian titles borne by tradition, "Archduke/Archduchess of Austria".
Arms of Princess Astrid of Belgium, Archduchess of Austria-Este
Gustaaf Janssens, Archivist of the Royal Palace, confirms that HRH Princess Astrid's coat of arms as Princess of Belgium consist of the gold lion on a black background on a lozenge ensigned with the royal crown.
Sable a lion rampant Or armed and langued Gules. French : De sable au lion d'or armé et lampassé de gueules
* also an infanta of Spain by marriage
** also a princess of Tuscany by marriage
*** also a princess of Modena by marriage
^also an archduchess of Austria in her own right
^^did not have a royal or noble title by birth