The former Scrubs star is currently promoting her new movie, Mother's Day, which will open in U.S. theatres a week before the annual holiday (08May16), and Chalke reveals this year's celebrations will be extra special as she is due later this spring (16).

The child will be a little brother or sister for Chalke's six-year-old son Charlie Rhodes, with her lawyer husband Jamie Afifi, reports People.com.