Her other roles include the lead in Disney's Enchanted, Amelia Earhart in Night at the Museum: Battle of the Smithsonian, Academy Award-nominated performances in Doubt and The Fighter, and playing Julie opposite Meryl Streep in Julie and Julia.
Adams told The Huffington Post that she was invited to appear in the movie by Segel and Kermit the Frog: "This is something I grew up with and was in love with. When I heard they were doing a new one I was really excited. Jason sent me a DVD where he and Kermit were inviting me to be part of The Muppets. It was really cool. Once Kermit asks you to do something it is really hard to look at him and say, 'No.' So I was hooked!" 
Segel says that the role was written with Adams in mind: "I wrote it for her. She was in my mind from the beginning. I mean this woman can do anything. But she's able to do this wide-eyed naivety that is not part of her personality in real life. She's one of the most smart, on top of it women I've ever met. But she can do this kind of thing that was really... my character, her character, and Walter are true innocence. She's able to do that. She channels it through her eyes, and she can sing. She is totally game. She's up for it. She also really gets the joke. So she was just the perfect choice right from the start. I don't know what I would have done if we hadn't gotten her." 
Adams appeared as a guest on the March 8, 2008 episode of Saturday Night Live. The episode featured a skit with cast member Kristen Wiig's character Penelope, who has a habit of one-upping the people around her. Amy Adams' character is a traffic school teacher who finally gets fed up with student Penelope and says, "You know what, Penelope? I have had enough... I guess now's a good time to tell everyone I'm friends with Kermit the Frog. What do you think of that?" Penelope responds, "Um, guess I'll say that, um, I'm best friends with all Muppets. Including Scooter, so, I was invited to all of their weddings, so..."
- ↑ 1.0 1.1 "Jason Segel, Amy Adams Talk The Muppets, Kermit Invitation", The Huffington Post. June 21, 2011.