Masters Of Sex Couple Lizzy Caplan, Michael Sheen Enjoys 'The World's End' Premiere [TRAILER]: Will It Become The New Mad Men?

"Masters of Sex" will be premiering September 29 on Showtime, and co-stars Lizzy Caplan and Michael Sheen took the time to enjoy "The World's End" together.

As seen on Perez Hilton, Lizzy Caplan and Michael Sheen may have become a real off-screen couple after filming "Masters of Sex" together, as they look quite comfortable at the movie premiere.

Reportedly, Michael Sheen has broken up with Rachel McAdams, and perhaps has found romance in his new co-star.

"Masters of Sex" is an upcoming Showtime drama, about Dr. Williams Masters (Michael Sheen) and Virginia Johnson (Lizzy Caplan), two pioneering researchers of human sexuality.

The series, like "Mad Men," is a period piece set in the 50's and 60's era, with distinct fashion and style.

As noted by Wall Street Journal contributor Christina Binkley, "Masters of Sex" aims to capture the look of a certain period of America, much "Mad Man."

"The production took pains to convey the era without aping the wildly influential high-fashion look of 'Mad Men,'" writes Binkley in talking with executive producer Michelle Ashford.

"We're not fetishizing it."

Check out the alluring trailer of "Masters of Sex" below featuring Michael Sheen and Lizzy Caplan.

But more importantly, are you excited about Michael Sheen and Lizzy Caplan potentially dating in real life? Do you think it's just a rumor?