Jennifer Garner says she is devastated that Alias is ending.

The actress has played lead character Sydney Bristow for five seasons, and confesses that it has become part of her life.

She explained: "It feels like it's time. To me, this show had a finite amount of stories that we could tell. [The writers] shove a ton of story into every episode. So we've told, in five years, what some people would do in seven seasons.

"We've done Sydney right, and now it's time for her to go off into the sunset. But that doesn't mean that my heart doesn't break, and I'm not going through a total identity crisis, because I am."