Jennifer Garner loved learning to carve butter for a new movie.

The 38-year-old actress enjoyed sculpting pieces out of the churned dairy product for her new movie - entitled 'Butter' - but found she wasn't very good at it, with many of her cast doubting her abilities.

She said: "Turns out, butter carving is so satisfying and is the most, most fun!

"I was carving a sculpture in a relief of a man walking on a rainy day, and I thought, 'This is a man, walking on a rainy day!' and the rest of the cast was like, 'Uh, yeah that's a blob of butter.' "

'Butter' - which also stars Alicia Silverstone, Ashley Greene, Ty Burrell and Hugh Jackman - tells the tale of a butter carving championship in the mid-west of the US, and she admits she had a great time filming the political satire, directed by Jim Field Smith.

She told "I play the wife of Ty Burrell, who has been the Iowa state champion in butter-carving at the state festival for the past 15 years, and we had a blast together. It's an incredible cast and my production company was a part of producing it, which was a thrill for me.

"And I think that it is a story that is going to be a lot of fun to have out in the world. I don't play the nicest person but it sure was delicious trying her on."