United Kingdom, Dec. 24 -- Amy Poehler is "too scared" to invite Martha Stewart on her podcast.

The 54-year-old star has had some of the biggest names in the entertainment world on her Good Hang podcast - but Amy is hesitant about inviting Martha, 84, onto the show, having previously impersonated the TV personality on Saturday Night Live.

During the latest episode of her podcast, Amy quipped: "Martha, I'm not going to invite you on the show because I'm too scared but please listen and know that you're something else."

Amy subsequently explained that a motionless mouth is key to impersonating Martha.

She added: "It's a barely moving mouth . we're going to make a Christmas meal and barely nothing's going to move."

Meanwhile, Martha pre...