[3] The following year, in 1988, he joined the Disney-MGM Studio in Orlando, Florida, working on the short film RollerCoaster Rabbit.

Williams gave the character a "nervous twitch", a "wrestler's strut" and "big hands with broken nails that look creepy on close-ups".

[13] His work as an animator includes Who Framed Roger Rabbit (1988), The Princess and the Cobbler (1993), The Lion King (1994), Quest for Camelot (1998), The Iron Giant (1999), The Road to El Dorado (2000), Spirit: Stallion of the Cimarron (2002), Piglet's Big Movie, Sinbad: Legend of the Seven Seas (2003), Robots (2005) and Open Season (2006).

[2] Williams has also worked on visual effects in Racing Stripes (2005), Monster House (2006), Underdog (2007), Beverly Hills Chihuahua, Inkheart (2008), Harry Potter and the Half-Blood Prince (2009), Marmaduke (2010) and The Chronicles of Narnia: The Voyage of the Dawn Treader (2010)[2] He has contributed designs to Deckchair Dreams, a fundraising event organised by the Royal Parks Foundation in support of the London Royal Parks.

[16][17] Williams has also founded the world's first online based MA in animation at Buckinghamshire New University, beginning in September 2015.