Alexander Wigglesworth is a Cardiff-based, New Zealand-born, musician who works across opera, theatrical, and vocal settings as a collaborative pianist, coach, and musical director. Alexander’s work spans a wide range of the repertoire, highlights include Hansel & Gretel (Longborough Festival Opera), Jonathan Dove's Itch (Jonathan Dove, Opera Holland Park), Tosca (Wellington Opera), Heathers: The Musical (Pop-Up Productions), and the children’s theatre piece Goldilocks a la Mozart (William Green, Opera Otago).

Alexander founded and directed the Ōwheo Quartet in 2022, a New Zealand-based piano quartet that play pop-meets-classical arrangements for weddings and functions. He is the primary music arranger, and was the managing director while living in New Zealand. He also arranges music for choirs, including waiata (Māori song). As a composer, Alexander contributed songs to Sarah Delahunty’s musical adaptation of her play, Eating the Wolf.

In choral music, Alexander has worked in secular, sacred, and educational settings, as an accompanist, choral director, and organist. This has included working with choirs in national/international competitions, conducting community choirs & church choirs, and preparing choirs for massed choral works, including Faure's Requiem, Handel’s Messiah, and Jenkins' The Armed Man. Alexander was also a member of New Zealand's professional chamber choir, Voices New Zealand.

Alexander enjoys working in musical theatre, and has worked on various productions, including Jersey Boys, Into the Woods, and West Side Story.