Suggestions by @sofly

Patti LaBelle

as Ursula in The Little Mermaid

Jennifer Hudson

as Ella Fitzgerald in Female Singer Biopics

Bella Maltzman

as Karana in Island of the Blue Dolphins

Emma Stone

as Daisy in Bowfinger

Steve Coogan

as Archie Leach in A Fish Called Wanda

Charles Edwards

as Ken Pile in A Fish Called Wanda

Edgar Wright

as Director in A Fish Called Wanda

Bradley Cooper

as Otto West in A Fish Called Wanda

Anne Hathaway

as Wanda Gershwitz in A Fish Called Wanda

Billie Lourd

as Janis Joplin in Celebrity Biopics

Keira Knightley

as Ayn Rand in Celebrity Biopics

Mary J. Blige

as Nina Simone in Celebrity Biopics

James Marsden

as Whizzer in Falsettos

Ewan McGregor

as Marvin in Falsettos

Sarah Silverman

as Trina in Falsettos

Anne Hathaway

as Trina in Falsettos

Hugh Jackman

as Marvin in Falsettos

Rihanna

as Josephine Baker in Josephine

Anne Hathaway

as Alison in Fun Home

Anika Noni Rose

as First Lady Michelle Obama in Hope and Change