Ryan Reynolds and Scarlett Johansson did not split because of Blake Lively or anyone else, nor did their separation stem from one particular issue.
They two stars simply grew apart under the strain of managing two thriving careers and leading separate lives, a source close to the couple says.
"There's no third party," says the source, who adds that Ryan and Scarlett's separation was a mutual decision they made about a month ago.
Reynolds and Johansson were married in 2008.
"They had been having some issues for months. Distance played a big role. When you don't spend a lot of time with your partner you grow apart."
Recently, they "started to lead different lives, and it was harder and harder to come back together and pick up where they left off," the source says.
Still only 26 now (Ryan is 34), "Scarlett was young when they married. She's a mature person but at points they were just on different pages."
Reynolds, who is filming a movie in Atlanta, and Johansson, who is currently in Jamaica with some girlfriends, remain firmly on good terms.
Don't expect that to waver, either, says the source: "They had an intense, loving relationship, and they'll always love and respect each other."