The Goop English garden party [Getty]
Stella and Gwyneth are fashion besties, bonding over their love of Coldplay and veganism. Gwyn sits next to Paul McCartney on the front row; Stella let's Gwyneth run wild in the Stella McCartney showroom. Now they have joined forces to work on a project for Gwyneth's lifestyle blog Goop. We just don't know what that project is.
You might think that Gwyneth has a problem with keeping secrets - remember that time she opened up to Ellen about how she keeps her lady garden, erm, trim? But Gwyneth has gone super sneaky, as she posted a picture on her website of their faces merged with the line Stella McCartney X Goop launching September '13.
So what could this collaboration be? We have got into the gluten-free mindset to cook up some Goop-tastic projects. Perhaps they have created the ultimate Quinoa recipe or home-brewed bath salts? Maybe a new line of body illusion dresses focused on the side-bum? The pair hosted an English garden party for Goop last week, so perhaps they have gone all Pippa Middleton and made a guide for how to have a wild (but totally organic) party. Gwyneth's cook book did give detailed descriptions of how to make a sandwich.
Then there is fashion. Stels has worked with Adidas and Team GB, so it could be a line of Tracy Anderson-tested yoga pants. Stella posted a picture of Gwyneth wearing one of her bikinis on Instagram last week so they could be working on a range of swimwear to show off her 22-year-old stripper's butt? Or maybe the clue is in the date, as September is fashion month (duh) so perhaps this is a surprise Goop catwalk show?
See some of our Goop-tastic ideas using Stella's Instagram in the gallery below...