Q: Passage: Lisa Diane Whelchel (born May 29, 1963) is an American actress, singer, songwriter, author, and public speaker. She is known for her appearances as a Mouseketeer on The New Mickey Mouse Club and her nine-year role as the preppy and wealthy Blair Warner on The Facts of Life. In 1984, she was nominated for a Grammy Award for Best Inspirational Performance for her contemporary Christian album, All Because of You. Since 2009, she has been a regular speaker with Women of Faith Christian conferences. In 2012, Whelchel participated as a contestant on the CBS competitive reality series Survivor: Philippines and tied for second place. She was also voted fan favorite and was awarded $100,000.

Question: Based on this passage, who played blair in the facts of life? Let's give stream of consciousness first:
To answer the above question, the relevant sentence is: She is known for her appearances as a Mouseketeer on The New Mickey Mouse Club and her nine-year role as the preppy and wealthy Blair Warner on The Facts of Life. Therefore, the final answer is Lisa Diane Whelchel.