Girl's Day's Minah (32) and actor On Joo-wan (41) are officially tying the knot — and they've personally shared their heartfelt thoughts with fans.

💌 On Joo-wan: "I'll protect and cherish Minah"

On July 4, On Joo-wan took to Instagram to say, "First, I'd like to express my understanding to fans and friends who may have been surprised by the sudden news."

He thanked his loyal fanbase, writing, "To my beloved fans who sent warm congratulations, thank you as always for smiling brightly and chatting with me whenever we meet. I'm always grateful."

He also sent a message to Minah's fans: "I'll protect and cherish her without letting a scratch touch her. I know how much strength you give her — please continue to love and support Minah just as you always have."

🌸 Minah: "I'm happy"

Minah also shared a touching letter via Instagram. "To those surprised by the sudden news, I ask for your understanding. And thank you, sincerely, to everyone who congratulated us with such warmth," she wrote.

She continued, "Right now, I'm quietly preparing for a new season in life. I'll carry your love in my heart for a long time and walk my path slowly and firmly." And she added a simple but powerful line: "I'm happy."

💍 Their story: From drama co-stars to soulmates

Minah and On Joo-wan first met on the set of SBS-TV drama "Beautiful Gong Shim" in 2016. They reconnected in 2021 while starring in the musical "The Days," which sparked their romance.

The couple will hold a private wedding this November, attended only by close family and friends.

Both agencies shared in a statement, "Please send warm blessings and support to the couple as they begin this new chapter of life together as husband and wife."