Brad Pitt and Angelina Jolie's daughter Shiloh is not even a year old, but she's already landed a cameo in her proud papa's new movie.

Pitt had taken along his youngest to the sets of his new movie, 'The Curious Case of Benjamin Button', in which he stars with his 'Babel' co-star Cate Blanchett.However, when the twins hired for playing actress Cate Blanchett's character as a baby, refused to calm down no matter what their parents tried, the actor quickly realised that his daughter' happy and mellow nature made her perfect for the part.

"Brad and Shiloh saved the day when twin sisters hired to take turns playing actress Cate Blanchett's character as a baby wouldn't settle down," the National Enquirer quoted a source, as saying.

"Everyone waited in vain while the babies were fed, changed and hugged - but nothing worked to calm them on the set in New Orleans. Then quick-thinking Brad realised his daughter's happy and mellow disposition made her a quick fix for the role," the source revealed.

As for how baby Shiloh fared, well with Brad and Angelina as her parents, it seems that acting seems to be in the little girls' genes.

"She's a natural. Shiloh did her scenes perfectly and was giggling and happy throughout her big day," the insider added.