Alexandra, Countess of Frederiksborg attends the charity walk ECCO Walkathon, September 20, 2015 Alexandra, Countess of Frederiksborg and sons HH Prince Nikolai of Denmark (R) and HH Prince Felix of Denmark attends the charity walk ECCO Walkathon, September 20, 2015. Alexandra, Countess of Frederiksborg attends the ECCO Walkathon 2015 (L-R) Prince Felix of Denmark with his mother Alexandra, Countess of Frederiksborg and oldest brother Prince Nikolai of Denmark attends the charity walk ECCO Walkathon, September 20, 2015.  (C) Alexandra, Countess of Frederiksborg with sons HH Prince Nikolai (L) and HH Prince Felix (R) during the charity walk ECCO Walkathon 2015 on September 20, 2015. (L-R) Danish Prince Nikolai, Alexandra, Countess of Frederiksborg and Danish Prince Felix attends the charity walk ECCO Walkathon 2015 Alexandra, Countess of Frederiksborg attends the ECCO Walkathon 2015 Alexandra, Countess of Frederiksborg with sons HH Prince Nikolai (R) and HH Prince Felix (L) during the charity walk ECCO Walkathon, September 20, 2015 (L-R) HH Prince Nikolai of Denmark with his mother Alexandra, Countess of Frederiksborg and younger brother HH Prince Felix of Denmark attends the charity walk ECCO Walkathon 2015  Alexandra, Countess of Frederiksborg with sons Prince Nikolai (R) and Prince Felix (L) during the charity walk ECCO Walkathon, September 20, 2015 Countess Alexandra with sons Prince Nikolai (R) and Prince Felix (L) attending the charity walk ECCO Walkathon, September 20, 2015 Countess Alexandra of Frederiksborg attends the ECCO Walkathon 2015  Alexandra, Countess of Frederiksborg attends the ECCO Walkathon 2015 Alexandra, Countess of Frederiksborg attends the ECCO Walkathon 2015 Alexandra, Countess of Frederiksborg attends the ECCO Walkathon 2015 (R) Alexandra, Countess of Frederiksborg attends the charity walk ECCO Walkathon, September 20, 2015. HH Prince Nikolai of Denmark attends the charity walk ECCO Walkathon, September 20, 2015. Alexandra, Countess of Frederiksborg and youngest son HH Prince Felix of Denmark attends the charity walk ECCO Walkathon 2015 Alexandra, Countess of Frederiksborg attends the charity walk ECCO Walkathon 2015. Prince Felix of Denmark attends the charity walk ECCO Walkathon, September 20, 2015. Prince Nikolai of Denmark attends the charity walk ECCO Walkathon, September 20, 2015. (L-R) Prince Felix of Denmark with his mother Alexandra, Countess of Frederiksborg and oldest brother Prince Nikolai of Denmark attends the charity walk ECCO Walkathon 2015. Alexandra, Countess of Frederiksborg and son Prince Nikolai of Denmark attends the charity walk ECCO Walkathon 2015.