[10][11] Manheim's acting career began at the age of six,[2] in a local after-school program in Culver City.

[13] Manheim followed this up by being cast in a lead role in the Disney Channel television movie Zombies, which premiered on February 16, 2018.

[17] On November 19, 2018, Manheim and Carson finished the competition in second place, losing to radio personality Bobby Bones.

[18] In August 2022, Manheim was cast in a lead role, opposite Peyton List, in a Paramount+ series called School Spirits.

[19] In February 2025, he's set to begin starring as Seymour in the Off-Broadway revival of Little Shop of Horrors.