Theeradej Wongpuapan is the youngest child of Weeraprawat Wongpuapan (his father) and Kanchana Wongpuapan (his mother). His father is a director and mother is a TV drama writer; her pseudonyms are Worapan Rawee, Leelawadee and Daeng Rawee. He began acting at the suggestion of his father. In 1985, when he was seven years old, he appeared in
The Six Siblings (หกพี่น้อง) on Channel 3, which was directed by his father. He next acted in the TV drama
My Sweet Orange Tree (ต้นส้มแสนรัก) on Channel 3. He then stopped acting to attend เซนต์ดอมินิก School until he was in high school. Then, he shortly studied for his bachelor's degree at
ABAC University before he went to study at the
Brooks Institute of Photography in
California, USA. He soon had to leave school, after two years of study, because of the
1997 Asian financial crisis. He returned to Thailand to be a model, presenter, and actor in TV Drama, movies, and music video. He appeared in
Super Luk Toong on Channel 9 1998, followed by
Queen of Luk Toong Pumpuang Duangjan (ราชินีลูกทุ่ง พุ่มพวง ดวงจันทร์) on Channel 7 in 1999, and
The Ridiculous Battle (ฝนตกขี้หมูไหลคนอะไรมาพบกัน) on Channel 3 in 2000. Ken was known extensively and popularly from "Eternal Love" ("สองเรานิรันดร") played with "Phiyada Akkaraseranee", "Chain of Love" ("อุ้มรัก") and "Paradise Diversion" ("สวรรค์เบี่ยง") with "Ann Thongprasom". The approximate rating from "นีลเส็น" of "Paradise Diversion" was 14.6; the finale was 18.7. In "2009", he came back to play on "Bangkok Traffic Love Story" ("รถไฟฟ้ามาหานะเธอ") which was the most gaining profits movie in 2009, 145.5 million baht. Ken was appointed to be a special Thai ambassador of "UNICEF" ("2008" – present) and a presenter of “"White Ribbon Year Project"” which campaigning the violence to children, feminine, and families. This is a project of the "Developing Social and Stability of Humans Ministry of Thailand" ("2010"). Ken Theeradej Wongpuapan's #1 leading female onscreen is
Ann Thongprasom #1 Pra'nangs. ==Personal life==