Kevin-Prince Boateng showed his love for his boyhood club with a Hertha flag immortalised on his chest after completing his move.
Boateng made a return to the club on a one-year deal.
The 34-year-old began his career at the Olympiastadion before moving to Tottenham Hotspur on a four-year deal in July 2007.
Having left AC Monza , the 34-year-old returned to Hertha Berlin as a free agent after featuring for Borussia Dortmund, Portsmouth, Genoa, AC Milan, Schalke 04, Las Palmas, Eintracht Frankfurt, Sassuolo, Barcelona, Fiorentina and Besiktas.
"Hertha BSC is not just any club for me," Boateng told the club's media.
"I'm here to give something back. I've been around a lot over the years and learned a lot, but all that, my whole career, I owe to this club. I have never forgotten that Hertha was always in my heart."
The Ghanaian becomes the club’s second signing after Suat Serdar.