Michelle Williams has signed on to star alongside Amy Schumer in upcoming comedy I Feel Pretty.

Williams, 36, will play Avery LeClaire, the stunning cosmetics company boss to Schumer’s Renee Bennett.

According to Deadline the story follows Renee (Schumer) who struggles with self-doubt and feelings of inadequacy in a world of beautiful people.

Coming soon: Michelle Williams has signed on to star with Amy Schumer in her new comedy I Feel Pretty

After an accident in which she bumps her head after falling off an exercise bike, Renee believes a spell has suddenly made her the most beautiful and capable woman in the world. But to everyone else, she looks the same.

Renee's new confidence sees her climbing the ranks at the cosmetics company she works and getting the respect of her idol and boss Avery (Williams).

Eventually she realizes the 'spell' has lifted but learns that beauty is not skin deep.

Last week STXfilms closed a deal in the $15 million range for the US rights to I Feel Pretty in a Cannes acquisition.

The movie will mark the directorial debut of screenwriters Abby Kohn and Marc Silverstein.

Funny girl: Schumer, 35, wrote and starred in the hit comedy Trainwreck and can currently be seen opposite Goldie Hawn in Snatched

'Amy is a spectacularly talented comedienne and actress and this story could not be more perfectly suited to her incisive observational skills and humor,' said STXfilms chief Adam Fogelson.

Production begins this July on the east coast.

Schumer, 35, wrote and starred in the hit comedy Trainwreck and can currently be seen opposite Goldie Hawn in Snatched.

Williams meanwhile received her fourth Oscar nomination for Manchester by the Sea this year.