The Mamma Mia! star split from Phillippe at the end of May (11), after a seven-months romance, when the Crash actor became a dad for a third time last July (11) following a brief 2010 fling with model Alexis Knapp.
Seyfried, 26, refuses to go into details about the reasons behind her break-up with Phillippe, who also has two kids with ex-wife Reese Witherspoon, but suggests the 37 year old's personal situation was just too complicated for her.
She tells Glamour magazine, "We don't (keep in touch)... His situation is very difficult... You know when two people shouldn't be together from the get-go? That's why (we split)."