Kristen Bell says pregnancy has given her a deeper voice.

The 'Veronica Mars' actress claims her vocal cords have changed, dropping an octave since giving birth to her daughter, Lincoln, in March.

She told People magazine: ''The pregnancy did change my voice. It made it deeper. There were more womanly tones when I did one recording while I was extremely pregnant.

''After I had the baby, I had to go back and re-record those lines so they matched. There was something different about my voice.''

The 38-year-old star is still unsure why her voice changed so drastically, but has written it off as one of the mysterious changes hormones can have on a pregnant woman.

Kristen explained: ''There was something more 'Mommy' about my voice and we had to fix it. I certainly didn't intend that, and when you heard it, you couldn't really place why it was different but it was.

''It was one of those hormonal things that happen, I guess.''

The blonde and her husband, Dax Shepard, have been busy adjusting to parenthood over the last few months and Kristen loves seeing the actor fawn over their daughter.

Kristen gushed: ''It is amazing to see him with her. To have something alive that is part of both of us is a really lovely feeling.''