Peter said that his voice work on Optimus Prime had a lot of inspiration from his brother and former US Arine, Larry.
Peter donated to the Auto Assembly 2009's Charity Auction.
Peter attended the NASA OPTIMUS PRIME Spinoff Award in 2010.
Peter's first job in film was in the 1969 Canadian film Prologue.
Peter's first "big paycheck" came from doing a radio drama called "The Lark". It was in 1959 and he got $90.
Originally, the producers the the 2007 Transformers movie didn't even think of having Peter to do the voice of Prime. It was through the fans that the studio gave the role to Peter.
Peter did voice work for the video game, Warcraft Adventures: Lord of the Clans.
Peter has three children: Clay, Claire and Pilar E. Cullen.
In 1963, Cullen was part of the first graduating class of the National Theatre School in Canada.
Peter has stated that of all the roles that he has done, his signature role, Optimus Prime, is his favorite.
Peter says that he based the voice of Optimus Prime on the voice of legendary American film actor John Wayne.
Peter frequently does voice overs for commercials, cartoons, and movie previews.
Peter Cullen stands at 5'8" (1.73 m).
Peter: (on acting) And don't be so proud that you expect perhaps 50 lines and you only get half a line. That half line could take you to another line and so on. Always have the courage and the love of your craft to keep on going despite the disappointments because there will be many.
Peter: (on the continuing success of The Transformers) Never once did I ever think that. I always approached every character that I created with an impending doom, like "How long?", "How many seasons?", "How many shows?", "How many minutes?" and then move onto the next one.
Peter: (on Optimus Prime's character) But the character traits that I think the fan base were feeling were I guess strength, courage, integrity, the honor and the passion...that leadership quality that I think the fans attached themselves to all of those years ago. They are still there, I'm glad to say.
when asked about how hegot started
Peter: For me, it goes back to my early childhood. I had a penchant for doing sounds. I could do dogs and cats and cows and horses and little things like that.
About the Transformer's fans
Peter: I never saw a fan letter. I don't know who got them. That's why I was so surprised so many years later to find out that he was so popular. I didn't know.
On creating Optimus Prime's voice
Peter: I kind of modeled Optimus Prime's voice out of many people I had known over the years, my family especially.
On his first cartoon voice work
Peter: It was Mighty Man and Yuk with Frank Welker, a silly little cartoon that I transformed into a little superhero.
Peter (about playing Optimus Prime in the 2007 film): It's like slipping into a very old, very comfortable pair of shoes.