Solange Knowles is expected to say 'I do' to her longtime boyfriend Alan Fergusson.
Beyoncé was in New Orleans, without her husband Jay Z and daughter Blue Ivy, for her little sister's pre-wedding party.
The wedding festivities kicked off with 28-year-old Solange and her longtime boyfriend treating Beyoncé, 33, and about 50 of their friends to cinema night at the Indywood Move Theatre.
According to the theatre's Facebook page, Beyonce, Solange and company watched the Diana Ross 1975 classic film Mahogany, which was the movie they saw on their first date, as People reported.
'They rented out the theatre for a pre-wedding party,' the message read. 'It was beautiful, they were beautiful, Diana Ross is beautiful, love is beautiful.'
Before the film played, the couple screened a very personal documentary that they made of how they met.