Kirstie Alley fulfils her bikini pledge

Kirstie Alley

Kirstie Alley donned a bikini to show off her new figure this week on The Oprah Winfrey Show.

To the sounds of the Commodores' Brick House, Alley, 55, strutted on to the stage in a maroon bikini - fulfilling a pledge she made to Winfrey about a year ago.

The actress has lost 34kg after hitting a high of 99kg. She said she's learned how to make smart choices when dining out. For exercise, she dances and works out with a personal trainer. She's also quit smoking.