Nine Naphat Siangsomboon is a Thai actor born in Bangkok, Thailand. He is the son of Thai actress Pimpaka Siangsomboon, the second runner-up of Miss Thailand World 1988. After graduating from Bromsgrove International School, he went on to study communication design at Mahidol University International College.

Nine made his first on-screen appearance in Nivea For Men TV commercial before eventually getting his first lakorn role in 2017's "Rak Kan Panlawan" ( รักกันพัลวัน). He was an artist under Channel 3 (ช่อง 3) from 2015 until the end of 2024. Today, he is freelance actor.