Oliver Stark stops by New York Live to tell Sara Gore and Jacque Reid what it is like to play a firefighter on Fox's "9-1-1."

Oliver Stark attends the FOX 2019 Upfront party at Wollman Rink in Central Park on May 13, 2019, in New York.

Oliver Stark and Aisha Hinds at the "Sound The Alarm" Campaign in Cabrillo High School on May 11, 2019 in Long Beach, California.

We've added screenshots from Episode 17, "Careful What You Wish For," of Season 2 of 9-1-1.

We've added screenshots from Episode 16, "Bobby Begins Again," of Season 2 of 9-1-1.

We've added screenshots from Episode 15, "Ocean's 9-1-1," of Season 2 of 9-1-1.

The actor on eating mostly fruit and training like a firefighter.

We've added screenshots from Episode 14, "Broken," of Season 2 of 9-1-1.

We've added screenshots from Episode 13, "Fight or Flight," of Season 2 of 9-1-1.