His first career break came in 2003 when he was discovered by talent scouts for
MTV and cast in the network's reality series
Road Rules for its
South Pacific season. The three-month adventure in the South Pacific, and a subsequent appearance on the seventh season of
Real World/Road Rules Challenge provided the resources to pay off his college debt and further cemented his decision to pursue acting as a full-time career. In 2007, he moved to
Los Angeles to further pursue an acting career. There he studied under director and acting teacher Chris Fields before joining the Echo Theater Company. A long series of guest appearances on various TV series and TV movies followed, including
Nip/Tuck,
Veronica Mars, ''
Grey's Anatomy, Ghost Whisperer, Privileged, Without a Trace, and Cold Case among others. Giuntoli was also in consideration for the title role of the relaunched Superman
movie Man of Steel but was eventually beaten out by English actor Henry Cavill. He played the role of Scott Wickland, DS agent, in 13 Hours, directed by Michael Bay. In 2016, he played the lead role of David in the comedy film Buddymoon'', a film that he created with
Flula Borg and Alex Simmons. He starred in the ABC series
A Million Little Things, which aired for five seasons from 2018 to 2023. == Personal life ==