RuPaul Andre Charles (born November 17, 1960), known mononymously as RuPaul, is an American drag queen, television judge, musician, and model. Best known for producing, hosting, and judging the reality competition series RuPaul's Drag Race, he has received several accolades, including eleven Primetime Emmy Awards, three GLAAD Media Awards, a Critics' Choice Television Award, two Billboard Music Awards, and a Tony Award. Description above from the Wikipedia article RuPaul, licensed under CC-BY-SA, full list of contributors on Wikipedia.

RuPaul plays as Self - RuMail in RuPaul's Drag Race All Stars.
RuPaul is the top #1 member of the cast and appears in 29 episodes.

Carson Kressley plays as Himself - Judge in RuPaul's Drag Race All Stars.
Carson Kressley is the top #2 member of the cast and appears in 17 episodes.

Todrick Hall (born April 4, 1985) is a vocalist, actor, director, choreographer and entertainer from Arlington, TX. He became well-known when he auditioned for the ninth season of American Idol, where he made it to the semi-finals. Since then, Hall has been performing on Broadway and YouTube. As of 2013, Hall is under the management of Scooter Braun Projects. He was featured in Forbes Top 30 under 30 in the Hollywood category in 2014.

Todrick Hall plays as Himself - Judge in RuPaul's Drag Race All Stars.
Todrick Hall is the top #3 member of the cast and appears in 9 episodes.

Ross Mathews is an American television host who made his television debut as a correspondent for "The Tonight Show with Jay Leno."

Ross Mathews plays as Himself - Judge in RuPaul's Drag Race All Stars.
Ross Mathews is the top #4 member of the cast and appears in 8 episodes.

Michelle Visage is an American singer, television host, radio DJ, performer, television producer and media personality.

Michelle Visage plays as Self - Judge in RuPaul's Drag Race All Stars.
Michelle Visage is the top #5 member of the cast and appears in 6 episodes.

Santino Rice plays as Himself - Judge in RuPaul's Drag Race All Stars.
Santino Rice is the top #6 member of the cast and appears in 6 episodes.