He is an accomplished musician and vocalist, playing drums, guitar, bass and harmonica, and has produced several solo tracks on which he performs all instruments himself.

He is vocalist and drummer for psychedelic rock band Robert Jones, with friends Robert Hudson and AJ Durham, although the band is on hiatus (2011) due to Caleb's career and other members' educational commitments. Their first album, 'Men and Their Horses' was released as a digital download in 2009.

Graduated from the same high school as Bill Engvall and Jeff Dunham.

He was born on the same day as X-Men: First Class (2011) co-star Nicholas Hoult: December 7, 1989.

Tried to look at her "a bit more differently" to Rose Byrne as Moira McTarget always when he could on screen, so fans would notice that as a reference to his character's love connection with Moira in the comics (in which they're both adults).