Jiruntanin Trairattanayon (จิรันธนิน ตรัยรัตนยนต์; born June 15, 1997), nicknamed Mark (มาร์ค), is a Thai actor, model and youtuber under GMMTV. He made his acting debut in 2022 with a supporting role in the series "Star and Sky: Star in My Mind" (แล้วแต่ดาว).