The event took place at Rolling Greens Nursery in Los Angeles.
The official Goop website describes the gathering as a "wellness summit geared toward exploring and discovering optimal well-being."
Gwyneth, 46, dressed chic in a gorgeous green ensemble with her blonde hair cascading down both her shoulders.
Olivia, 35, stunned in a plaid business look.
Jessica, 38, who owns her own company just like Gwyneth, appeared happy in a black and white getup.
Other attendees included actresses Busy Philipps and Taraji P. Henson.
Who gets your pick for best dressed at Gwyneth's event? Sound off in the comments!