Aussie actress Rachel Griffiths is pregnant with her third child, People reports.

Griffiths and husband Andrew Taylor already are parents to a 5-year-old son, Banjo Patrick, and daughter Adelaide Rose, 3.

Sources at ABC's Brothers & Sisters tell that Griffiths' pregnancy will not be written into divorced mom Sarah's storyline. Production on the series' current season will have wrapped by the time Griffiths enters her third trimester.