Hey I'm a Phi Mu and the thing about Steel Magnolias is true. The story is based on the life of a Phi Mu, her name was Susan Harling. The story I belive was written by her brother in memory of her.
There is a Phi Mu composite, which really was of Susan Harling's chapter and year, and also Julia Roberts wears a badge in the scene were her mother is putting on her corsage after the wedding. There is also refernce to the color pink.. "its her signature color.."
and there is a pink and white wedding with pink carnations.. i saw it for the first time at one of my retreats.. it was pretty interesting so see all the phi mu stuff all over it..

hope that helps
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Love, Honor, Truth