How the 'People v. O.J. Simpson' Cast Transformed Into Their Famous Characters

FX’s The People v. O.J. Simpson: American Crime Story is a fascinating look back at an unforgettable moment in pop-culture history. But the whole thing would fall apart if the actors didn’t look exactly like the famous characters they’re playing. Luckily for us, they do.

In the video above, the cast details for Yahoo TV the physical transformations they had to go through to inhabit their characters, from wigs to weight gain. John Travolta, who plays Simpson defense attorney Robert Shapiro, talks about recreating Shapiro’s distinctive eyebrows and receding hairline, and says such transformations are a valuable part of his acting process.

Photos: The O.J. Simpson Trial: Where Are They Now?

To play prosecutor Marcia Clark, Sarah Paulson says she had to wear a wig that matched Clark’s trademark curls, along with a lot of makeup to make her look “super tired.” Cuba Gooding Jr., who plays Simpson, remembers adhering to a strict exercise regimen before shooting, and then eating whatever he wanted: “I gained twenty pounds!”

David Schwimmer, who plays O.J. pal Robert Kardashian, sums it up best: “The hair and makeup people on this show are astonishing.”

The People v. O.J. Simpson: American Crime Story airs Tuesdays at 10 p.m. on FX.