Arm Weerayut Chansook is an actor, singer, model, MC and fashion designer under GMMTV. In 2015, he graduated with a bachelor's degree from the Faculty of Fine Arts at Srinakharinwirot University, majoring in Acting and Directing.

In 2007, Arm participated in the Luk Thung Star Contest where he placed as first runner-up. Later, he enrolled in a singing school. He started in the entertainment industry in 2010 as an artist under the record label RS Public Company Limited. With his singing and dancing abilities, he was selected as a member of Rookie BB, a boy band under the management of RS Music.

In 2016, Arm joined GMMTV where he made his acting debut with a supporting role in the series "Senior Secret Love: Bake Me Love". Representing his home county, he performed with his fellow GMMTV artist Amp Phurikulkrit Chusakdiskulwibul in South Korea during the 2018 DMC Festival, an annual event organized by Munhwa Broadcasting Corporation (MBC).

Aside his acting and singing career, Arm has become known for his fashion and styling skills through his lifestyle program "Arm Share". He owns two clothing brands: Homles and AWC. He's also the owner of AWC studio.