He later appeared in films such as The Whole Nine Yards (2000), Freddy Got Fingered (2001) and Sorority Boys (2002), and provided voices in works such as Gary & Mike, Robots (2005), Meet the Robinsons (2007), and Sausage Party (2016).

[4][5] Williams enrolled in Sheridan College in 1983, where he studied animation and media arts,[6] while periodically working as a forest ranger at Fort Frances.

[9] He credits a 1993 appearance on Late Night with David Letterman for a break through,[10] and Jim Carrey for bringing him to the attention of the Farrelly brothers, who cast Williams in his debut role as a police officer in Dumb and Dumber (1994).

[8][11] Other film roles include Freddy Got Fingered, There's Something About Mary, Half Baked, RocketMan, Sorority Boys, Down Periscope, Superstar and Employee of The Month.

Williams's ventures include voicing 'Monster' on Nickelodeon's animated series Robot and Monster and starring as Warwick the Warlock in Disney's direct-to-DVD movie Spooky Buddies.