Robert "Rob" Rackstraw (born October 31, 1965) is a British voice actor who is best known for his roles as Scoop (UK), Muck (UK), Roley (UK), Travis (UK) and Spud (UK; Spud, UK/US) in the British HiT Entertainment children's television series, Bob the Builder (classic version), Campion in Watership Down, Professor Professor in The Secret Show, and James (US since 2015/UK since 2017), Toby (UK since 2015), Etienne (UK/US), Axel (UK/US), Donald (UK/US, both since 2016), Stanley (US 2016), Flynn (UK/US, both since 2015), Raul (UK/US), Monty (US), and many other characters in Thomas & Friends.

For Disney, he currently voices Kwazii the Cat in the Disney Junior British children's television series The Octonauts.