Suggestions by @brenosilvacosta2

Reverse-Flash

as The Yellow Man in The Flash (2000)

Dan Hedaya

as Colonel Darryl Frye in The Flash (2000)

Bridgette Wilson-Sampras

as Patty Spivot in The Flash (2000)

Naveen Andrews

as David Singh in The Flash (2000)

Geoff Johns

as Influences in The Flash (2000)

Trevor Rabin

as Composer in The Flash (2000)

Spoiler

as The Yellow Man in The Flash (2000)

Tim Curry

as AbraKadabra in The Flash (2000)

Treat Williams

as Captain joe west in The Flash (2000)

John C. McGinley

as Captain Cold in The Flash (2000)

Charisma Carpenter

as Iris West in The Flash (2000)

Chris O'Donnell

as Barry Allen in The Flash (2000)

Elijah Wood

as Evan in Superbad (1997)

Rider Strong

as Greg in Superbad (1997)

Paul Rudd

as Officer Slater in Superbad (1997)

Sean Astin

as Officer Michaels in Superbad (1997)

Laura Prepon

as Becca in Superbad (1997)

Michelle Williams

as Jules in Superbad (1997)

Charlie Korsmo

as Fogell in Superbad (1997)

Ron Lester

as Seth in Superbad (1997)