The new parents, who welcomed their baby girl Wyatt Isabelle in September, will star in a film within 'Annie', called 'Moonquake Lake', reported Contactmusic.
In the movie, the character of Will Stacks, played by Jamie Foxx and the titular star, played by the 11-year-old actress Quvenzhane Wallis will go to the cinema to see the film, where Kunis and Kutcher play lovers.
Kunis, 31, and Kutcher, 36, will then be confronted by a blue villain, played by the pop star Rihanna.
Cameron Diaz and Rose Byrne are also set to star in the film, which is due out in cinemas this December 25.