“The Flash” cast has received another super boost, with Robbie Amell set to remain in the CW family after landing the recurring role of Ronnie Raymond (aka Firestorm) in the “Arrow” spinoff.

The “Tomorrow People” star — and cousin of “Arrow” lead Stephen Amell — will make his debut in the third episode of “The Flash’s” freshman season.

Ronnie Raymond, a maintenance worker at STAR Labs and Dr. Caitlin Snow’s (Danielle Panabaker) fiancé, plays an integral part in the particle accelerator accident that transforms Barry Allen (Grant Gustin) into the Flash.

“Flash” executive producer Greg Berlanti said of Amell’s casting: “Geoff Johns, Andrew Kreisberg and myself designed the pilot and series to include Ronnie (aka Firestorm) — and to actually have someone with Robbie’s talent playing the role is beyond exciting. We can’t wait for viewers and fans of the character to check it out.”

Amell added, “I’m so excited to join forces with Greg Berlanti and the CW again on ‘The Flash.’ Being brought into the DC Universe is a dream, I can’t wait to get started!”

In the comics mythology, high schooler Ronnie Raymond was caught in a nuclear accident along with physicist Martin Stein, and the encounter fused them together as the nuclear-powered Firestorm. Since Stein was unconscious during the accident, Raymond was predominantly in control of his Firestorm form, while Stein provided a voice of reason in his head.

Amell recently wrapped production on feature film “The Duff” for CBS Films, and is filming indie pic “Max.” He is represented by WME, Protégé Entertainment and Coast to Coast.