"After almost 6 loving and wonderful years together, we have decided to end our relationship," the former couple tweeted.
"This was an incredibly difficult decision for both of us, but we have realized more than anything that we are better as best friends," they continued. "We will always be supportive of one another. Thank you to everyone who has offered us kindness and support over the years."
The message is signed: "With only love, Wilmer & Demi."
No reason was given for the split.