It's pretty safe to assume that if you're playing The Flash, the best preparation you can do for the role is run. Fast. So that's what Grant Gustin, who just landed the part on the CW's Arrow, is doing.

"I'm kind of running around a little bit, but mostly just for fun at this point," Gustin laughed on the red carpet at The Hollywood Reporter's Nominees and TV's New Season pre-Emmys party. "Just because I'm really excited...I'm a little fanboy. I'm so excited to be a part of the show."

Gustin, who previously starred as Sebastian on Glee, told us how he got the part, explaining, "I got an audition and I was really excited and a little skeptical at first, because I'm a comic book fan. I know the character and know I'm a little young."

He said it was a "long audition process" but the moment he found out he got the part made it all worthwhile: "I was at the ocean in Malibu with a buddy of mine," he recalled. "And just had a movie moment and jumped in the ocean afterwards. It was pretty amazing."