But following 28-year-old Solage’s shocking lift attack on Jay, 44, in May, it is said the reunion could be quite awkward for the trio.
While Beyonce, 33, and little sister Solange have always seemed close, reports suggest the Crazy In Love will not be bridesmaid on the big day.
A source told a US website: “Beyonce will be at the wedding.”
However they could not confirm what her role will be.
Two-year-old Blue Ivy will also be present, but apparently Solange is still undecided about inviting her dad Matthew Knowles.
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In a previous statement regarding the lift incident, Beyonce insisted Jay and Solange had resolved their problems.
She said: “The most important thing is that our family has worked through it. Jay and Solange each assume their share of responsibility for what has occurred.
“They both acknowledge their role in this private matter that has played out in the public. They have both apologised to each other and we have moved forward as a family.”
This will be Solange’s second wedding, after she married Daniel Smith in 2004. The couple had son Julez together, before divorcing in 2007.
Speaking to a US magazine earlier this year, Solange gushed about Alan.
She said: “Luckily, I dated all of the losers ages ago. My love life has been stable for a while.”