Gotham's New Star Speaks! Donal Logue on Joining the "Exciting" World of Batman

Sons of Anarchy veteran is heading to Gotham City and told us all about his new gig on the highly anticipated Fox series

Donal Logue is getting a badge and gun in Fox's Gotham, but first he's popping up on Law & Order: SVU as quite the thorn in Rollins' (Kelli Giddish) side.

We were on set as Logue, who just wrapped a massive Sons of Anarchy arc and can next be seen in Vikings season two, filmed his Law & Order: SVU debut and couldn't resist asking about all things Gotham.

Rumors of Logue's involvement first started in January, before any roles were even cast. On Feb. 12 the news broke that he'd be entering the big bad world of Batman as Detective Harvey Bullock, not Jim Gordon as originally rumored.

"I'm super excited. Gotham—it was weird, I've never been on a ride like that. It pre-dated SVU, I met them and talked to them and there was some weird internet rumor that I was playing Commissioner Gordon—he wasn't the commissioner at the time—and I'm like, ‘I'm way too old, man!' It was weird to be part of this kind of ongoing discussion that I was not in the mix of," Logue told E! News. "It's an exciting thing; it's going to be here in New York. It's one of those funny things where they're super secretive, so you have to go to a secret place to read a script and give away your phone."

Starring opposite Logue is Southland and The O.C. veteran Ben McKenzie as Jim Gordon, Batman's future confidant. The cast also includes Robin Lord Taylor as Oswald Cobblepot, the man who will become the Penguin; Sean Pertwee as Alfred Pennyworth, Bruce Wayne's butler; Zabryna Guevara will play Captain Essen, Gordon and Bullock's boss; and Erin Richards as Barbara Kean, Gordon's fiancé.

"The cast is lining up. I'm really excited to work Ben—I was huge fan of Southland—and Danny Cannon, the director, who I've worked with before and is a buddy of mine is on the same soccer team as me."

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But just because he's got a badge, doesn't mean Logue's character is a straight-laced good guy.

"He might be pretty morally reprehensible too," Logue said. "Harvey Bullock, he definitely has walked on both sides. Harvey's a detective the way that right now Rollins is a detective. There's a morally ambiguous world that he runs in."

Stay tuned for more from the set of Law & Order: SVU.

(E! and Law & Order: SVU are both part of the NBCUniversal family.)