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So Peter Cullen and Frank Welker were known to start doing stand up comedy routines during their vo…

HASCON 2017 Peter Cullen and Frank Welker Transformers Panel Video

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Watch Transformers Prime

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FanX Salt Lake Comic Convention - 💥Please welcome our next FanX 2021 guests, Peter Cullen and Frank Welker, best known for their voice acting roles as Optimus Prime (Cullen) and Megatron (Welker)

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Transformers 4 - Peter Cullen and Frank Welker Comment on New Optimus Prime and Movie Characters