Born in San Luis Obispo, California, in 1987, Efron first started out with small parts in television shows like ER, Summerland, and NCIS.
On NCIS, Troian Bellisario portrayed Sara McGee, the younger sister of NCIS Special Agent Tim McGee portrayed by Bellisario's stepbrother actor Sean Murray.
The actor is a frequent guest star on multiple dramas including NCIS, Numb3rs, Criminal Minds, Sliders and Touched by An Angel.