Morgan Spurlock's ex-wife Sara Bernstein and their eight-year-old son Kallen "will miss him forever"

In a post on Instagram, Sara wrote: "Thank you for all the love and support the past few days. We so appreciate it.

"As Kallen said to me 'Morgan was the best daddy ever and we will love and miss him forever and ever'. Lots of love to you all."

Morgan was previously married to married to Priscilla Sommer from 1996 to 2003 and then Alex Jamieson - mother of his 27-year-old son Laken - from 2006 until 2011.

Alex also shared a tribute to her ex on Instagram alongside a montage of pictures from over the years. She wrote: "It's impossible to put into words what you meant to your family, to your boys, friends, film community ... to me. I'm just so glad we were friends in the end.

"Morgan was a generous, creative, dedicated human. He LOVED his friends and boys. When he got into something he dove in heart first, with his body and soul."

She added: "Even when we weren't getting along, we would come together to celebrate and laugh about our amazing boy and how he was growing up to be kind, funny, creative.

"I miss you dearly, friend. I didn't know it would hurt so much. Rest now."

The moviemaker found global fame when he directed and starred in the acclaimed documentary 'Super Size Me', which followed him as he consumed nothing but items from McDonald's for 30 days and was nominated for an Oscar for his work.

His brother Craig, who worked with his sibling on several projects, said in a statement to Variety: "It was a sad day, as we said goodbye to my brother Morgan.

"Morgan gave so much through his art, ideas and generosity. Today the world has lost a true creative genius and a special man. I am so proud to have worked together with him."