and laced up their trainers for a fun family day out with their on Monday - and royal watchers couldn't believe the difference in 13-year-old twins and . The teenagers were last seen publicly in January at their , when they joined their parents and elder siblings, Crown Prince Christian, 18, and Princess Isabella, 17, on the balcony at Christiansborg Palace. Josephine and Vincent were pictured with Isabella before taking part in the One Mile Family race in Copenhagen during King Frederik's Royal Run event, which took place against five different locations in Denmark.
"OMG ! It seems to me, like it was yesterday, the twins are born...
" one social media follower commented. "Omg, the twins have grown up!" another agreed, while a third added: "Beautiful siblings. The twins have so grown up.
" After crossing the finish line, the Danish royal palace also shared a snap of Frederik, Vincent and Josephine back at the palace with their two beloved Border Collies wearing their medals. The Royal Run was initiated by Crown Prince Frederik to mark his 50 birthday in 2018, and has since become an annual race. Around 95,330 runners took to the streets to take part in the event in Brønderslev, Aarhus, Fredericia, Kalundborg and Copenhagen / Frederiksberg.
King Frederik will celebrate his 56 birthday on Sunday 26 May with an appearance on the palace balcony to mark the occasion. It comes just over a week after he and Mary celebrated their 20 wedding anniversary, which coincided with their Norw.