Just like that, our hearts break all over again.

Nathen Garson, the only child of Sex and the CityAlum Willie Garson, paid tribute to his late dad on what would have been the star’s 58th birthday.

Nathen, 20 years old, wrote on Instagram that “Happy birthday Papa,” along with an Instagram throwback shot of himself and his dad. Miss you tons, I love you.

The actor, who played fan-favorite supporting character Stanford Blatch on HBO’s Sex and the CityHe died in September at the age of 57 from pancreatic cancer. This was only weeks after finishing filming scenes for his sequel series. Just Like That…

Nathen wrote a touching tribute on Instagram to his father, saying, “I Love You So Much Papa. Rest in Peace, I am so grateful that you were able share your experiences with me. Your accomplishments are amazing. Although I’ll always be your best friend, I believe it’s high time you embark on an adventure of a lifetime.