Stallone voices an ant in this early CGI-animated effort from DreamWorks. Sly apparently got the role of tough soldier Weaver because he was willing to do it for free, whereas first-choice Arnold Schwarzenegger wanted paying.
The film still stands as one of the funniest in DreamWorks canon.
Tough Guy? It's in his nature as a soldier ant (and the little insect bears a strong resemblance to the chiselled big guy).