[4] His videos' success caught the attention of the theater industry and led to him receiving offers from agents.

[5] In 2015, he served as a correspondent for Perez Hilton during the 2015 Tony Awards and was referenced in the opening number of the show.

[6] In January 2017, Armitage starred in the Law & Order: Special Victims Unit episode "Chasing Theo," playing a young child who had been kidnapped.

In the same year, he played Ziggy Chapman in the HBO series Big Little Lies and appeared in The Glass Castle, a film adaptation of Jeannette Walls' memoir of the same name.

Armitage has learned to speak multiple languages to different extents, including Russian, Armenian, Arabic, Ukrainian, German, Spanish, Italian, Assyrian, and Sinhalese.