Mårten Messiah Nils Gustav Hallberg, born 18 January 1984 in St. Johannes parish in Stockholm, is a Swedish comedian, journalist and presenter.

Messiah Hallberg was born in Stockholm and is the son of actors Nils Hallberg and Marie-Louise Werklund. His given name was originally Mårten, but was changed to Messiah before he turned 18. After high school, Hallberg trained as a journalist at Mid Sweden University in Sundsvall.