King Philippe of Belgium takes his Children for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015.

King Philippe of Belgium arrives with his children (from L) Crown Princess Elisabeth, Princess Eleonore and Prince Gabriel for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

Belgian King Philippe arrives with his children Crown Princess Elisabeth and Prince Gabriel for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

Princess Eleonore of Belgium greeted as she arrives on the first day of School at the Sint-Jan-Berchmans college in Brussels with King Philippe, Crown Princess Elisabeth and Prince Gabriel on September 1, 2015

Belgian King Philippe brings his children from left Crown Princess Elisabeth, Princess Eleonore and Prince Gabriel for their first day of School at the at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

Crown Princess Elisabeth bag details as she arrive for the first school-day at the Sint-Jan-Berchmans college in Brussels, brought by father HM King Philippe

Crown Princess Elisabeth arrives for the first school-day at the Sint-Jan-Berchmanscollege in Brussels on September 1, 2015

Crown Princess Elisabeth arrives for the first school-day at the Sint-Jan-Berchmanscollege in Brussels on September 1, 2015

Crown Princess Elisabeth first day of School at the Sint Jan Berchmancollege school in Brussels, Belgium, 1 September 2015.

Prince Gabriel of Belgium bag details on the first day of School at  the Sint Jan Berchmancollege school in Brussels, Belgium, 1 September 2015.

Crown Princess Elisabeth of Belgium first day of School at the Sint Jan Berchmancollege school in Brussels, Belgium, 1 September 2015.

King Philippe of Belgium bring his children (from L-R) Princess Elisabeth, Prince Gabriel and Princess Eleonore to the Sint Jan Berchman college school in Brussels, Belgium, 1 September 2015.

King Philippe of Belgium bring his children for the first day of School at the Sint Jan Berchmancollege school in Brussels, Belgium, 1 September 2015.

King Philippe of Belgium arrives with his children (from L) Crown Princess Elisabeth, Princess Eleonore and Prince Gabriel for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015.

King Philippe of Belgium bring his children Crown Princess Elisabeth and Prince Gabriel (L) for their first day of  School at the Sint Jan Berchman college school in Brussels, Belgium, 1 September 2015.

(L-R) Crown  Princess Elisabeth, King Philippe, Prince Gabriel and Princess Eleonore arrive for the first school-day at the Sint-Jan-Berchmanscollege in Brussels, on September 1, 2015

(L-R) Belgian Crown Princess Elisabeth, King Philippe and Princess Eleonore arrive for the first school-day at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

(L-R) Princess Eleonore, King Philippe and Prince Gabriel of Belgium arrive for the first school-day at the Sint-Jan-Berchmans college in Brussels, on September 1, 2015

(L-R) Crown Princess Elisabeth, King Philippe, Prince Gabriel and Princess Eleonore of Belgium arrive for the first school-day at the Sint-Jan-Berchmanscollege in Brussels on September 1, 2015

(L-R) Belgium Crown Princess Elisabeth, King Philippe, Prince Gabriel and Princess Eleonore arrive for the first school-day at the Sint-Jan-Berchmanscollege in Brussels on September 2015

(L-R) Crown Princess Elisabeth and Princess Eleonore arrive for the first school-day 2015 at the Sint-Jan-Berchmanscollege in Brussels

(L-R) Prince Gabriel, King Philippe and Crown Princess Elisabeth of Belgium arrive for the first school-day at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

Crown Princess Elisabeth of Belgium greeted as she arrive for the first school-day at the Sint-Jan-Berchmanscollege in Brussels on September 1, 2015

(L-R) Crown Princess Elisabeth and her youngest sister Princess Eleonore arrives for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

King Philippe of Belgium arrives with his oldest son Prince Gabriel for the first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015

King Philippe of Belgium arrives with his children (from L) Crown Princess Elisabeth, Princess Eleonore and Prince Gabriel for their first day of school at the Sint-Jan-Berchmans college in Brussels on September 1, 2015.