Sharing the big news on Instagram, Zavion wrote: "It's official, I have the honour of designing @demileighnp and @timtebow's wedding - cannot wait. Proudly South African."
In the photo, both have their laptops open, while Demi-Leigh pretends to look overwhelmed with the process.
Zavion launched his event coordinating company in 2010 and specialises in event management, wedding planning and floral design.
In 2018, Zavion, who is on the Wedding Basher panel, was a supporting host at the Miss South Africa pageant and also designed set pieces.
South Africans in the comment section are thrilled with news the pair will be working together, saying they're sure it will be a beautiful affair.