The cutest birthday portraits of Denmark's Prince Vincent and Princess Josephine

Crown Prince Frederik and Princess Mary's twins, Prince Vincent and Princess Josephine of Denmark, have melted hearts with their cherubic smiles and sunny personalities since their arrival in 2011. In celebration of their birthday on Jan. 8, the palace releases portraits of the pair and the pictures just get cuter every year.

Vincent and Josephine, who is 26 minutes younger than her brother, are often pictured both together and individually.

TAP IMAGE FOR FULL GALLERY

Princess Josephine was born 26 minutes after her brother Prince Vincent.

For their upcoming fifth birthday, Mary and Frederik may choose to call on an official photographer to take the pictures as they have done in previous years. Or, doting mom Mary, 43, could go behind the camera herself, as she did for their second birthday.

Since their birth in 2011, when Frederik described his new arrivals as "miracles times two," the blond tots have changed remarkably.

Doting dad Prince Frederik described his new arrivals as "miracles times two."

The young scene-stealers have become the stars of the show during family photo shoots and holidays, pictured giggling away and bonding with their older siblings Prince Christian, 10, and eight-year-old Princess Isabella.

The family have just returned from their Christmas holidays in Mary's homeland, Australia, but are back to the normal routine of school and royal engagements.

The twins' older siblings are Prince Christian, 10, and eight-year-old Princess Isabella.

This weekend will be the perfect time to celebrate the twins' birthday with their extended family – Frederik's parents Queen Margrethe II and Prince Henrik, and Frederik's younger brother, Prince Joachim, and Joachim's family.

The royals will likely celebrate in the privacy of their home, as they've done previously.

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