[5] They first appeared in public as toddlers both alternatively playing 'Thomas' on the ITV romantic drama William and Mary featuring Martin Clunes and Julie Graham in 2005.

[citation needed] In 2017, BBC's children's television strand CBBC aired My Life: Max & Harvey, a documentary produced by the duo, which gave fans an inside look into their lives and career.

[citation needed] In April 2018, Max and Harvey became the first to sign with RMI Records, a new label formed by Disney Music Group.

[25] In February 2020, it was announced that Max and Harvey will join Jordan Banjo, Perri Keily, and Holly H in hosting Nickelodeon's Slimefest 2021.

[32] In December 2020, the duo released a new single “Worry a Little Less” via Frtyfve Records, and announced a UK 10-date tour - “This is Not a Phase” in August 2021.

[33] In April 2021, they released the emotional ballad “In My DNA” via Frtyfve Records, which pays tribute to their grandfather who has been battling Alzheimer’s for the past 4 years and their grandma who suffered from cancer.

[42][43] In 2020, the duo received their second nomination for Favourite Social Music Star at the Nickelodeon Kids’ Choice Awards.