Just over two months ago she stepped out to support American troops attending the Marine Corps ball with a lucky sergeant.

And it appears that Mila Kunis is always happy to support a good cause attending the St Jude Children’s research Hospital 50th Anniversary Gala.

The 28-year-old opted for a racy dress for the evening stepping out in a purple gown with a low cut neckline held together with a tie.

The feminine dress also boasted a frilled skirt and she teamed the bold look with a pair of peep toe heels.

Mila attended the event which helps children fighting cancer and other fatal diseases alongside a number of familiar faces.

Sex And The City star Kirsten Davies also opted for a plunging neckline wearing a simple black dress to the charity event.