Suggestions by @joker10

Ryan Reynolds

as Wade Wilson/Deadpool in X-23

Hugh Jackman

as Logan in X-23

Dafne Keen

as Laura Kinney/X-23 in X-23

Finn Wolfhard

as Cameron Boyce in Actor Biopics

Mike Myers

as Chris Farley in Actor Biopics

Peyton List

as Brittney Murphy in Actor Biopics

Chris Evans

as Jim Henson in Actor Biopics

Hayden Christensen

as Paul Walker in Actor Biopics

Jack McBrayer

as Don Knotts in Actor Biopics

Brian Doyle-Murray

as Don Rickles in Actor Biopics

John Leguizamo

as Roberto Gomez Bolanos in Actor Biopics

Donald Glover

as Richard Pryor in Actor Biopics

Billy Crystal

as Groucho Marx in Actor Biopics

Emma Watson

as Carrie Fisher in Actor Biopics

Joseph Gordon-Levitt

as Heath Ledger in Actor Biopics

Hugh Jackman

as Johnny Cash in Actor Biopics

Robert Redford

as Paul Newman in Actor Biopics

Danny DeVito

as Mickey Rooney in Actor Biopics

Benedict Cumberbatch

as Alan Rickman in Actor Biopics

Bruno Mars

as Michael Jackson in Actor Biopics