Adorable Princess Estelle of Sweden and her littel brother Prince Oscar have dressed in traditional costume to celebrate St Lucia Day on December 13, 2018

Sweden's Princess Estelle taking the role of the saint. Her mother Crown Princess Victoria chose to decorate Princess Estelle's crown with electric candles rather than wax ones and completed her outfit with a white dress and red sash as is tradition. Meanwhile Prince Oscar took on the role of a Stjaerngossen or 'star boy' which saw the toddler dressed in a white gown and pointed hat while wielding a wand.

Sweden's Princess Estelle took on the role of St Lucia, wearing a crown of candles on her head to light the way during the winter solstice, the shortest day of the year. She's seen carrying a basket of Luciaboller or saffron buns, traditionally enjoyed as part of the celebration.  While her brother Prince Oscar play the role of a Stjaerngossen or 'star boy', who dressed in a white gown and pointed hat while wielding a wand.

St Lucia Day comes ahead of the royal family selecting a Christmas tree for the palace. The students from the master's program at the Swedish University of Agricultural Sciences present them with a selection of firs. Pictured: Crown Princess Victoria, Princess Estelle and Prince Oscar of Sweden at last year's choosing

Swedish Royals enjoyed outing to annual Hagaloppet and Prince Daniel's Race and Pep Day at Haga Park on September 16, 2018 in Stockholm, Sweden.

Prince Oscar of Sweden- who bears a striking resemblance to his father Prince Daniel - at the annual Pep Day 2018 at Haga Park in Stockholm

Swedish Princess Estelle attends the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden, an annual event to encourage children to get active

Prince Oscar of Sweden looked a little unsure as he watched proceedings while holding firmly to his mother Crown Princess Victoria's hand

Sweden's Princess Victoria cuddled her children, Princess Estelle, and Prince Oscar, as they enjoyed an outing to annual Hagaloppet and Prince Daniel's race 2018 at Haga Park in Sweden.

Prince Oscar of Sweden wriggled away from his mother Crown Princess Victoria of Sweden at the event while watching Princess Estelle's (not seen) impressive skills

Prince Oscar, two, watched proceedings with mother Crown Princess Victoria of Sweden

Prince Oscar of Sweden kept a watchful eye on the sporting proceedings from the arms of his mother Crown Princess Victoria of Sweden

All children get a prize at the end of Prince Daniel's race and the royal was on hand at the end to present medals personally

Princess Estelle of Sweden, six, looked delighted to be trying out skateboarding during the Prince Daniels Race and Pep Day 2018 at Haga Park

Princess Estelle of Sweden looked confident as she practiced her new skills, wearing a blue helmet for safety during the Prince Daniels Race and Pep Day 2018 at Haga Park

Prince Daniel of Sweden, who was a Former personal trainer, organizes an annual race for children to take them to take part in sport, while runs alongside the Hagaloppet race for over 13s

Crown Princess Victoria of Sweden swapped her usual smart dresses for a sporty ensemble as she watched proceedings with her two years old son Prince Oscar of Sweden.

Princess Victoria of Sweden and Princess Estelle of Sweden attend the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden. Prince Daniels Race and Pep Day is an annual event to encourage children to get active.

Princess Victoria of Sweden and Princess Estelle of Sweden (R) attend the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Crown Princess Victoria swapped her usual smart dresses for sports gear, looking relaxed in a blue top and multicolored jacket teamed with blue jeans, holding the hand of their two-year-old son Prince Oscar. 

Sweden's Crown Princess Victoria swapped her usual smart dresses for a sporty ensemble as she watched proceedings with her son Prince Oscar during the Prince Daniels Race and Pep Day 2018 at Haga Park

Princess Victoria of Sweden and Prince Oscar of Sweden (C) look on as children compete during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Princess Victoria of Sweden and Prince Oscar of Sweden (C) look on as children compete during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Prince Oscar of Sweden looks on as children compete during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Princess Victoria of Sweden and Prince Oscar of Sweden (R) look on as children compete during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Prince Oscar of Sweden holding firmly to his mother Crown Princess Victoria's hand as he watched proceedings at the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Princess Victoria of Sweden and Prince Oscar of Sweden with Princess Estelle of Sweden after she completed her race during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Prince Oscar of Sweden kept a watchful eye on the sporting proceedings from the arms of his mother Crown Princess Victoria of Sweden

Princess Estelle of Sweden tries a skateboarding activity during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Swedish Princess Estelle got to try her hand at skateboarding, who looked confident as she practiced her new skills, wearing a blue helmet for safety at the annual Hagaloppet and Prince Daniel's race event 2018.

Princess Estelle of Sweden embraces with her mom Crown Princess Victoria of Sweden and brother Prince Oscar of Sweden after trying a skateboarding activity during the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden.

Prince Daniel Sweden attends the Prince Daniels Race and Pep Day 2018 at Haga Park in Stockholm, Sweden. Prince Daniels Race and Pep Day is an annual event to encourage children to get active.

(L) Princess Estelle of Sweden had the chance to try out skateboarding during a sports day 2018 at Haga Park in Stockholm

Princess Estelle of Sweden howled with laughter as she stepped off the skateboard while enjoying a family afternoon out at a sports day 2018 at Haga park

Crown Princess Victoria of Sweden swapped her usual smart dresses for a sporty ensemble as she watched proceedings with her son Prince Oscar of Sweden

Sweden's Crown Princess Victoria and Prince Daniel are joined by their adorable Children as they host their country's victorious ice hockey team in Stockholm on May 21, 2018

Sweden defeated Switzerland in a dramatic penalty shootout after the Ice Hockey World Championship finals at the Royal Arena in Copenhagen on Sunday, May 20, 2018, to retain the title they won against Canada in similar fashion a year ago, pictured with Princess Estelle and Prince Oscar while Crown Princess Victoria looks on.

Sweden's Crown Princess Victoria stunned in a pale blue sleeveless dress featuring floral detail was joined by her toddler Prince Oscar to meet the national ice hockey team at the sprawling royal residence.

Sweden's Crown Princess Victoria oozed regal glamour in the form-fitting satin dress which was cinched at the waist and adorned with a colorful floral pattern.  She swept her hair back into a ponytail and accessorized with a navy clutch and matching pumps, as they host their country's victorious ice hockey team in Stockholm

Victory pose: After meeting the royal family, the players posed for a group photo with their medals, the huge trophy taking center stage, from center 2nd row left to right: Crown Princess Victoria, Prince Daniel, Prince Carl Philip, Prince Oscar and Princess Estelle.

Sweden's Crown Princess Victoria was joined by her husband, Prince Daniel, and their two children Princess Estelle and Prince Oscar to meet the national ice hockey team as she hosted an informal reception at Stockholm's Royal Palace.

Sweden defeated Switzerland in a dramatic penalty shootout after the Ice Hockey World Championship finals at the Royal Arena in Copenhagen on Sunday, May 20, 2018 - posed with Swedish Royal Family 2nd row center L-R: Crown Princess Victoria, Prince Daniel, Prince Carl Philip, front row L-R: Prince Oscar and Princess Estelle

Sweden's Princess Victoria and Prince Daniel are joined by their adorable children Princess Estelle and two-year-old toddler Prince Oscar donning a team shirt signed by the athletes, as they host their country's victorious ice hockey team in Stockholm

(L-R 2nd row) Sweden's Crown Princess Victoria beamed with joy as she chatted to the players, with her two-year-old toddler Prince Oscar donning a team shirt signed by the athletes, her daughter Princess Estelle, her husband Prince Daniel and her brother Prince Carl Philip.

Adorable New Portraits of Princess Estelle and Prince Oscar of Sweden in celebration of Spring in the Gardens of Haga Castle, Stockholm on May 18, 2018

Second-in-line to the Swedish throne, Princess Estelle, looked every bit the young lady as she posed among the greenery

Sweden's Princess Estelle, six, and Prince Oscar, two, have posed for four adorable new portraits to celebrate Spring in the garden of Haga Castle, Stockholm

The adorable siblings Princess Estelle is every bit the doting big sister as she is seen showing her younger brother Prince Oscar around the park outside Haga castle in Stockholm

Prince Oscar, the youngest child of Crown Princess Victoria appears to be growing up fast, pictured climbing the trees in a touching black and white image in the park

Sweden's Princess Estelle Turns Six on February 23, 2018

Swedish Princess Estelle is celebrating her sixth birthday, grinning ear to ear, with a pink frosted cake. It was filled with raspberry yogurt mousse, vanilla cream, and fresh raspberries. Her sweet confection was created by pastry chef Stefan Roman, according to the Swedish journal Svenskdam. He and his team covered the cake with meringue and pink marzipan.

Sweden's Princess Estelle, looked adorable for the photo session wearing a blue grey dress, which she coordinated with a matching light-colored cardigan. The birthday Princess finished off her look by pulling her hair back into a sleek ponytail. Young Princess Estelle flashed her million dollar smile for the photos taken at her family’s home at Haga Palace in Stockholm

Sweden's Princess Estelle shares a slice of cake with her little brother, Prince Oscar, who turns 2 next month.

Sweden's Princess Estelle posed with her little brother, one-year-old Prince Oscar, to celebrate her sixth birthday at home at Haga Palace. The adorable royals, who are the children of Crown Princess Victoria and Prince Daniel

Princess Estelle of Sweden with a wide grin, the little Princess kneeled on a tree trunk in a pastel coat for the portrait in November 2017

Princess Victoria of Sweden took her children Princess Estelle and Prince Oscar to the Stockholm Cathedral on 22 February 2018 to present the exhibition Vivat Regina, presented to them by chaplain Ulf Lindgren. on left

Crown Princess Victoria of Sweden took her children Princess Estelle and Prince Oscar to Stockholm's Vivat Regina exhibition, were received by the chaplain of the cathedral, Ulf Lindgren  on February 22, 2018

Princess Victoria of Sweden took her children Princess Estelle and Prince Oscar to the Stockholm Cathedral on 22 February 2018 to present the exhibition Vivat Regina, presented to them by chaplain Ulf Lindgren.

Sweden's Crown Princess Victoria with her two children, Princess Estelle and Prince Oscar, visited the exhibition "Vivat Regina" in the Stockholm Cathedral on February 22, 2018

Crown Princess Victoria, Princess Estelle and Prince Oscar were received by the chaplain of the cathedral, Ulf Lindgren. He gave the Crown Princess and her children a tour through the exhibition. The exhibition “Vivat Regina” shows the national treasures and jewels used at Queen Kristina’s crowning in 1650.

Swedish Princess Estelle looked very impressed as the chaplain of the cathedral, Ulf Lindgren told stories about the crowning, as they visited the exhibition “Vivat Regina” at Stockholm Cathedral.

Sweden's Princess Estelle with her mother Crown Princess Victoria and her little brother Prince Oscar visited the exhibition "Vivat Regina" in the Stockholm Cathedral on February 22, 2018

Crown Princess Victoria, Princess Estelle and Prince Oscar were received by the chaplain of the cathedral, Ulf Lindgren during the exhibition “Vivat Regina” shows the national treasures and jewels used at Queen Kristina’s crowning in 1650.