Princess Victoria is seen cradling the youngest member of the royal family, Prince Oscar, in the first of the new pictures, while the second shows his elder sibling, Princess Estelle, who just turned four, giving her little brother a big hug and a beaming smile.
"We would like to convey our sincere gratitude for all the kind greetings and congratulations we have received in connection with Princess Estelle's birthday and the birth of Prince Oscar," reads the latest post from Princess Victoria and Prince Daniel on both the royal family's Facebook page and website.
"We genuinely appreciate your kindness and that so many of you share our happiness," it adds.
According to the Facebook post, the photo of Princess Estelle and Prince Oscar was taken by the pair's father, while Princess Victoria's headshot was snapped by photographer Kate Gabor, who has been commissioned to take a number of pictures of the Swedish royal family in recent years.
Prince Oscar was born on March 2nd weighing 3,655 grams and measuring 52 centimetres. He is third in line to the throne and holds the title of Duke of Skåne.
As well as his sister Princess Estelle, the baby boy has has two royal cousins, Princess Leonore and Prince Nicolas, who are the children of Princess Madeleine and her US-British husband Chris O'Neill.
Prince Carl Philip and Princess Sofia are expecting their first child later this month or in April.