triple threat

Short definition from Wiktionary

Noun

1. 1
   A person who is talented in three areas: An entertainer who can act, dance, and sing equally well (also known as "all rounder")
2. 2
   A person who is talented in three areas: A musician who is equally talented as an instrumentalist, singer and songwriter.
3. 3
   A person who is talented in three areas: A person in the film industry who can write, produce and direct.