Toni Collette Expecting Second Child

Actress Toni Collette arrives at the 62nd Annual Primetime Emmy Awards on Aug. 29, 2010, in Los Angeles. Frazer Harrison/Getty Images

NEW YORK (CBS) Toni Collette is adding another personality to her household.

The actress, who plays a mother with multiple personality disorder on "The United States of Tara," is expecting her second child with her husband, musician David Galafassi.

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The couple told People magazine on Monday that they are "very happy" about the new addition to their family. The actress is due in the spring, according to the report.

Collette, 37, and Galafassi wed in 2003, and are already parents to daughter Sage Florence, born in 2008.