Solange Knowles' Pre-Wedding Party Is a Movie Night

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A Diana Ross movie kicks off the wedding festivities.

There's nothing like a good romantic movie to put you in the mood for a wedding!

Singer Solange Knowles is marrying her video director fiance Alan Ferguson on Sunday, and the whole wedding party, including sister Beyonce, went to the Indywood Cinema to kick off the weekend.

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According to the Indywood Cinema Facebook page, Beyonce and Solange watched Mahogany last night.

is a 1975 American romantic drama starring Diana Ross as a poor African-American woman who becomes a popular fashion designer in Rome, but she must then decide whether she will live a material lifestyle in Rome or return to a man she loves in Chicago.

The Indywood Cinema writes, "Solange is getting married to a wonderful man on Sunday and they rented out the theater for a pre-wedding party. It was beautiful, they were beautiful, Diana Ross is beautiful, love is beautiful. "

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This will be the second marriage for Solange, 28. She was able to keep her engagement to Alan a secret, but she has posted pictures of the two of them on her Instagram with the caption, "this is love."

Watch our ET Flashback with Solange in the video below.