The recent achievements of world champion gymnast Lauren Mitchell may have led her to somewhat overshadow predecessor Allana Slater but not in the minds of selectors for WA's prestigious Hall of Champions.

Slater, a dual Olympian and three-times all-around national champion, will become one of three inductees elevated into rarefied company at tonight's annual WA Institute of Sport dinner at Challenge Stadium.

Selection panel chairman David Hatt revealed Slater had been at the forefront of discussions for several years.

Guidelines dictate an athlete must be retired from top-level sport for at least five years before being considered by the Hall of Champions committee.

Slater retired from gymnastics in August 2005, less than two years before Mitchell stepped into senior ranks.

"Allana is a very worthy member given her long and consistent career at the top of gymnastics, including being the first West Australian to place in the top three in a world championship," Hatt said.

"She's just been consistently good over a long period of time during the late 90s and early 2000s. She was a trendsetter in terms of success at the inter- national level and sustained success at national level."

Slater lifted Australia to prominence on the world gymnastics scene in 1999 as the first Australian to achieve a top-10 finish at a world championships.

Her career included nine medals won at World Cup events and three gold among her eight medals won at Commonwealth Games level.

Slater will join footballer and Geelong team of the century member Denis Marshall and leading WA reinsman Chris Lewis as Hall of Champions inductees tonight.

Marshall was voted in Geelong's best three players of the 20th century behind only Gary Ablett and Graham Farmer.

The four-times Claremont best and fairest winner was also runner-up in the 1968 Brownlow Medal. His interstate record included 16 matches for WA.

Lewis moved to WA from South Australia at the age of 20 and has driven more than 4000 winners to hold claim to the mantle of this State's greatest reinsman. He represented Australia at this year's world drivers' championship in the US.