Tony the Tiger has been the mascot of Frosted Flakes since its introduction. Tony is known for uttering the cereal's slogan: "They're Gr-r-reat!" (pronounced as one elongated word, not a stutter). Tony the Tiger was originally voiced by Dallas McKennon, but Thurl Ravenscroft voiced him for more than 50 years, until his death in 2005. Tony is currently voiced (in Canada and the US) by former professional wrestling play-by-play announcer Lee Marshall. Van Horne also voiced Tony in a 1997 television commercial. In the UK, Tom Hill voiced Tony after Ravenscroft's death. Tony is drawn wearing a red scarf on all Frosted Flakes cereal boxes.
Another character, Katy the Kangaroo, was on the Frosted Flakes box for a short time.
Kellogg's was a major sponsor of Adventures of Superman throughout most of the 1950s. Many of the Frosted Flakes commercials featuring the show's star George Reeves are available on the DVD release of the series' first season.
Frosties is a sponsor of Challenger Sports British Soccer Camps.