Ainsley Melham began his Music Theatre Career in 2016, skating into the Hayes Theatre as Sonny Malone in Mathew Managements' Xanadu. 

Soon after he traded skates for a magic carpet and opened Disney's Hit Broadway Musical and 'Must See Show of the Year' (Entertainment Weekly)  ALADDIN, in the title role. He toured Australia with the production playing Sydney, Melbourne, Brisbane and Perth.

In February 2019 he made his Broadway Debut at the New Amsterdam Theatre reprising his role as Aladdin in the broadway company, before travelling to London to film the production at The Prince Edward Theatre.

Upon his return to Australia he played Molina in the Melbourne Theatre Company’s production of Kiss of the Spider Woman, as well as the title role of Pippin in the Tony Award winning production at the Sydney Lyric Theatre, Charley Kringas in Merrily We Roll Along at the Hayes Theatre, and Prince Topher in Rodger’s and Hammerstein’s Cinderella.

Ainsley originated the role of Dwayne, alongside the cast of Boop! The Musical, which enjoyed a pre-Broadway run at the CIBC Theatre in Chicago. The musical is directed by 3 time Tony winner Jerry Mitchell, with a book by Tony winner Bob Martin, music by 16 time Grammy winner David Foster, and lyrics by Tony nominee Susan Birkenhead. The production will hit Broadway in the spring of 2025.

Currently, Ainsley is guest starring as Fiyero in the Australian National Tour of Wicked The Musical.

Preceding his MainStage theatre debut he trained at WAAPA (Western Australian Academy of Performing Arts) and was a cast member of the International Children's Pop Group Hi-5, having appeared in its Australasian tours, and its televised Hi-5 House Series .

In August 2020, Ainsley founded the charitable organisation We The Industry Inc. with Callum Francis. The organisation strives for equal access to, and greater representation within the Australian arts industry.