Why Billy Crystal & Josh Gad Are TV's Perfect Odd Couple in 'The Comedians'

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Billy Crystal and Josh Gad are TV's new odd couple in the upcoming FX series The Comedians, and they showed ET that there's little acting involved when it comes to their on-camera chemistry.

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On the show, Billy plays a superstar veteran comedian who is reluctantly paired with a young, edgy up-and-coming star (Josh Gad) for a late night sketch comedy show. The single-camera comedy, based on a Swedish format of the same title, marks Billy's first regular starring role in a TV series since his role as Jodie Dallas in the groundbreaking ABC comedy Soap, which ran from 1977-81.

Josh, 34, ribbed Billy, 67, during our interview (he did a less-than flattering impression of the Emmy winner), but he admitted that he was honored to share the screen with someone he admires so much.

"Getting a chance to work with an icon -- it was incredible," Josh said.

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Just the term "icon" made Billy cringe.

"It's just a euphemism for old," Billy joked.

While Josh grew up watching Billy in movies like City Slickers (Josh says he saw the comedy western at least 10 times), Billy became a fan of Josh after seeing him on Broadway in The Book of Mormon.

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"My mom too," Josh joked. "That was the first time she [noticed me]."

The Comedians debuts April 9 at 10 p.m. on FX.

We put Billy and Josh to the test to see if they could recall memorable lines from their biggest movies. Watch the hilarity ensue below.