Credit: Gilbert Carrasquillo/FilmMagic

Art is imitating life for Jenna Elfman!

The Accidentally on Purpose actress -- who is pregnant on the upcoming sitcom -- revealed Wednesday morning on CBS' The Early Show that she is expecting her second child with husband Bodhi Elfman.

See photos of more stars who are expecting!

"I have a baby in my tummy -- but a real one, not just for my TV show," the star, 37, said. "My character's pregnant the whole first season, so I said, 'It's a good time to have another baby, because we won't have to hide it.'"

The couple, who have been married since 1995, are already parents to son Story Elias, 2.

On her new series, which premieres Sept. 21 on CBS, Elfman plays a woman who becomes pregnant by a much-younger one-night stand.

Elfman jokes, "By episode three, if you look closely once it airs, you'll see ... 'Oh is she a little bloated? Did she have a big dinner?'"