The film will also feature the return of Bo Peep, voiced by Annie Potts, who was notably absent from Toy Story 3.
Toy Story 4 will be released in cinemas on 21 June 2019.
A fourth film is set to arrive after nearly a nine-year gap since Toy Story 3, and more than two decades after the original, which was released in 1995.
Tim Allen revealed Keanu Reeves has a very small role in the sequel, adding: “Keanu Reeves has got a great part.