The Backstreet Boy is now a West End man. Kevin Richardson, 32, the eldest member of the Backstreet Boys, is playing slickster lawyer Billy Flynn in the musical Chicago in London's West End. It's a role he also played for seven weeks on Broadway back in the spring.

Richardson, whose run wraps in November, recently opened up to PEOPLE about British theatergoers, fans who strip and the chances of a Backstreet Boys reunion.

Any fun behind-the-scenes stories from your arrival in London?
Just outside our stage doors, where people gather for autographs, there's a pub across the street. These three women come out. They've had too much to drink, and they just show me their breasts – and ask me to sign them! All the people around me were like, "He's married!"

Wow. Did that ever happen on the Backstreet Boys tours?
Um, yeah, it happened sometimes. (But) these girls were not shy.

Are London audiences different from New York audiences?
The response is a little more subdued. They're not as loud as the Americans are. The other cast members were like, "Don't be alarmed if they don't laugh or don't cheer as loudly. Don't let it throw you."

Is it different being on a theatrical stage as opposed to a concert stage?
It's a totally different satisfaction and adrenaline rush that I get. It's fun to be able to dive into this arrogant, cocky, fast-talking attorney, and I'm having fun with it. I take a lot of pride in doing theater, and it feels really good.

Is it scary?
The dialogue was scary for me. I worried about forgetting my dialogue. I stayed up till 3 o'clock in the morning studying my script before I went on Broadway. I sometimes over-prepare. I wish I would have done that in school.

Did you ever mess up your lines?
My third week in on Broadway I went completely blank in one spot. I was in profile so the audience couldn't see my eyes pop out of my head.