Actress Naomi Watts was spotted sporting a chocolate moustache while walking around the set of her upcoming film.

The 46-year-old suffered an eating malfunction on the sets of `Three Generations` with chocolate on her face after enjoying a chocolate chip cookie, reports eonline.com.

However, it is not sure whether the moustache was there on purpose for the film or just a mishap while snacking between takes.

In the film, Watts plays the mother of Elle Fanning, who is portraying a transgender teen transitioning from female to male.

Directed by Gaby Dellal, "Three Generations" also stars Susan Sarandon.