EXCLUSIVE: Tina Fey and Amy Poehler Impersonate Christopher Walken in Hilarious 'Sisters' Gag Reel

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There’s no doubt that Tina Fey and Amy Poehler are one funny
duo. The two actresses brought on the laughs in their latest film, Sisters, when it was released in
December.

Now that it’s available on Blu-ray and DVD, fans get a
chance to see how hilarious it was to make the comedy about two sisters who
return home find out their parents have put their childhood house up for sale.

MORE: Tina Fey Talks Meeting Caitlyn Jenner at the Oscars, Leonardo DiCaprio, and 'Mean Girls' Musical

ETonline has your exclusive first look at the Sisters gag reel before it’s released on
March 15. In the outtakes, the Saturday
Night Live
alums can barely keep it together as they flub their lines and
at one point, the two use the moment to run through their best impressions of
Christopher Walken.

“What… the… hell,” they both ask with spot-on Walken
mannerisms.

While the Fey and Poehler have formed a winning bond on
screen (they’ve hosted the Golden Globes, appeared on SNL together, and starred in 2008’s Baby Mama), the actresses revealed how they were brought together 20 years prior.

WATCH: Amy Poehler and Tina Fey Reveal How Their Kids Would Describe Them

“We were both told separately, like, ‘This girl, you're
gonna like her. You guys are gonna get along,’ and I think the fact that we
were put together as teammates has really shaped us,” Fey told ET about her
days with the improv team at Chicago’s Second City. “I think we really think of
ourselves as teammates in every context.”

“Yeah, it was kind of like an arranged marriage that
worked,” Poehler agreed.

Sisters is out on
Blu-ray/DVD on March 15 and is available on Digital HD now.