Peter Cullen, the Montreal-born actor who lent his calm and steady voice to Optimus Prime in the "Transformers" franchise, has died at age 85, his family says. Cullen voiced the heroic Optimus Prime in the Transformers TV series and then the Hollywood films. Key points and original sources are listed below.

• Peter Cullen, the Montreal-born actor who lent his calm and steady voice to Optimus Prime in the "Transformers" franchise, has died at age 85, his family says.S1

• Cullen voiced the heroic Optimus Prime in the Transformers TV series and then the Hollywood films.S2

• Peter Cullen, the legendary voice actor best known as Optimus Prime in the Transformers franchise, has died at the age of 85.S3

• Peter Cullen, who lent his distinct voice to the role of Transformers character Optimus Prime, has died at the age of 85.S4