Slater has been hired to provide an air of menace to an ad for Unilever's household bleach brand in the latest in its series of TV ads featuring computer-generated animated germs.
Created by ad agency Lowe London, there is no scheduled date for the ad to air, although it is likely to be in the next few weeks.
Slater got his break in the cult movie 'Heathers' in the 1980s, where Slater and Winona Ryder kill several of their school's most popular high school students. The first one is killed after being offered a cup of bleach prepared by Slater's character.
A spokesman for the company commented on the casting of Slater. "We've hired Christian because we wanted to try and bring the germs to life in the ad," he said. "He's perfect because he's got this husky, slightly dark voice. And, of course, there's a slightly dark side to him."
Slater could do with the germ killing power of Domestos himself after getting back in trouble in recent weeks when he was charged with sexual harassment in early June.
Slater, who is currently starring in the Broadway production of Tennessee Williams' 'The Glass Menagerie', was reported to have been rowing with his girlfriend when he walked up behind the alleged victim and squeezed her buttocks.
Slater has often been in the press for his off-screen antics involving drinking. However, more recently he received positive reviews for his performance in the West End adaptation of Ken Kesey's 'One Flew Over the Cuckoo Nest'.
After 'Heathers', Slater went on to appear in the likes of 'Pump Up the Volume', 'Young Guns II', 'Name of the Rose' and another cult movie Tony Scott's 1993 'True Romance'.
Earlier this month, an ad for Domestos Bleach Cleaning Spray was restricted from being broadcast during children's programmes after 27 complaints were received from viewers saying that their children found the animated germs too scary.
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