In the video, which now has over 300,000 views, the pair share a day in their lives with their vegan families.
A 20-year-vegan, Silverstone also shares details on her plant-based lifestyle and business ventures.
'Day In The Life'
The pair can be seen in the video preparing plant-based meals together, and discussing their favourite recipes.
Both mothers to young children, Fisher says that she bonded with Silverstone when their boys connected and became friends.
Also featured in the video is Silverstone's vegan cookbook, and a discussion of her vegan vitamin range.
The star released the products after failing to find a suitable organic multivitamin on the market during her pregnancy.
To access Plant Based News' vegan parenting course, The Ultimate Guide To Raising A Child Vegan, click here
To access Plant Based News' vegan pregnancy course, The Ultimate Guide To Vegan Pregnancy, click here