Public relations manager Haris Sianidis published an Instagram tribute to late Greek model and fitness instructor Gogo Mastrokosta on August 26, 2026, marking what would have been her 56th birthday.
Mastrokosta passed away in May 2026. Sianidis shared photographs from previous years when he spent her birthday alongside her, stating that he would always honor her memory and celebrate her until they meet again.
In the caption accompanying the images posted in the early hours of Wednesday, Sianidis wished Mastrokosta a happy birthday and noted that they had always organized and celebrated the occasion with friends and laughter in past years.
He wrote that she is celebrating in heaven this year after transforming into a star, adding that he will continue to celebrate her until they can celebrate together again.
Instagram tribute and family memories
The emotional message coincided with tributes from Mastrokosta's family. Her daughter, Victoria Della, whose father is former professional footballer Traianos Dellas, also shared a message on her birthday, calling her mother her angel and writing that her family would love her forever.
Della had previously published a social media message calling her mother her good angel three weeks after Mastrokosta died in May. In July 2026, following her high school graduation, Della shared words of tribute for her mother while expressing gratitude to her father.
Background on Gogo Mastrokosta
Mastrokosta was a prominent television personality, model, and fitness instructor in Greece who rose to fame during the 1990s and 2000s through regular appearances on Greek television broadcasts. Sianidis is a well known Greek public relations executive and event organizer who frequently manages celebrity publicity across Athens.
Dellas played as a defender for the Greece national football team and was a key member of the squad that won the UEFA European Championship in 2004, later transitioning into professional football management.
