Suggestions by @SpiderSonicPrime

Steven Weber

as George Stacy in Happy Birthday, Spider-Man! (Animated Special)

Emerson Brooks

as Robbie Robertson in Happy Birthday, Spider-Man! (Animated Special)

Natalie Lander

as Liz Allan in Happy Birthday, Spider-Man! (Animated Special)

Greg Berger

as Thing in Happy Birthday, Spider-Man! (Animated Special)

Andrew Morgado

as Thing in Happy Birthday, Spider-Man! (Animated Special)

Quinton Flynn

as Human Torch in Happy Birthday, Spider-Man! (Animated Special)

David Kaufman

as Human Torch in Happy Birthday, Spider-Man! (Animated Special)

Scott Whyte

as Human Torch in Happy Birthday, Spider-Man! (Animated Special)

Lori Alan

as Invisible Woman in Happy Birthday, Spider-Man! (Animated Special)

Erin Torpey

as Invisible Woman in Happy Birthday, Spider-Man! (Animated Special)

Suzie Yeung

as Invisible Woman in Happy Birthday, Spider-Man! (Animated Special)

Beau Weaver

as Mr. Fantastic in Happy Birthday, Spider-Man! (Animated Special)

Ian James Corlett

as Mr. Fantastic in Happy Birthday, Spider-Man! (Animated Special)

Grant George

as Ant-Man in Happy Birthday, Spider-Man! (Animated Special)

Dorian Harewood

as War Machine in Happy Birthday, Spider-Man! (Animated Special)

Christopher Judge

as Black Panther in Happy Birthday, Spider-Man! (Animated Special)

Jennifer Carpenter

as Black Widow in Happy Birthday, Spider-Man! (Animated Special)

Giacomo Gianniotti

as Hawkeye in Happy Birthday, Spider-Man! (Animated Special)

Lou Ferrigno

as Hulk in Happy Birthday, Spider-Man! (Animated Special)

Robert Hays

as Iron Man in Happy Birthday, Spider-Man! (Animated Special)