Los Angeles
"We had always been open to a third, but definitely didn''t think in the crazy year that the entire world was having that it would necessarily be this moment," Hewitt, 42, told People magazine.
The actor said they have been able to raise "two really special kids who will be great role models".
"This has been such a pleasant, beautiful, surprising gift in this time to be able to get to do all that again with another little human," she added.
Hewitt and Hallisay, also 42, have been married since 2013.
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