Tatiana Maslany's astounding portrayal of 11 incredibly diverse clones on BBC America's Orphan Black has turned her into one of the most talked about actors — and there is one person the 28-year-old consistently cites for helping her bring this award-winning role to life: Kathryn Alexandre.

"I could cry thinking about her," Maslany said of Alexandre, her Orphan Black clone double, during a Screen Actors Guild Foundation interview. "She's so amazing. She memorizes all of the lines, all of my blocking, all of her blocking, my mannerisms, my impulses; she, somehow, memorizes all of that and gives it back to me with a performance I can play off of."

Logistically, Alexandre acts opposite Maslany any time two or more of the clones interact — which is quite frequently — and delivers a screen-worthy performance before being replaced during post-production. While many actors would balk at the seemingly thankless job, Alexandre considers it the role of a lifetime.

"I'd just graduated theater school and didn't have much experience working on camera," the 24-year-old told BuzzFeed of being cast in 2012. "I didn't really know how complicated the role would become, but I'm working on such a wonderful show with such skilled people and learning so much. It's incredible."

And Alexandre has actually been involved with Orphan Black since before the cameras started rolling on the series, which is now in its second season. "I actually worked as a reader for the initial auditions when they were trying to find actors to play Sarah and Felix," she said of roles that went to Maslany and Jordan Gavaris respectively. "I was aware of the show and already in the room with other people who were auditioning for the leads, so I knew the casting director, and she's the one who brought me in to read for the double."