Rex Vijayan is an Indian composer, guitarist, singer, record producer and multi-instrumentalist from Kerala. He is best known for being co-founder and guitarist for the alternative Malayali rock band Avial. He started out his career as a composer in the Malayalam film industry through Kerala Cafe by giving the score to Anwar Rasheed's segment 'Bridge'.

Avial are an Indian alternative rock band formed in Thiruvananthapuram, Kerala, India in 2003, and known for their Malayalam lyrics. The band initially included lead vocalist Anandraj Benjamin Paul, guitarist Rex Vijayan, turntablist and backing vocalist Tony John, bassist Naresh Kamath and drummer Mithun Puthanveetil. Avial had their first breakthrough with the 2003 single "Nada Nada". They are known for pioneering what they call "Alternative Malayali rock", which is the style of combining Malayalam lyrics and rock music. Their eponymous album got them six out of seven Jack Daniels Rock Awards and Footprints Young Achiever's Award in 2008. The band was praised for achieving mainstream success despite singing in their native language.