Taye and Idina and baby makes three

After 13 years together,

Taye Diggs


Idina Menzel

are expecting their first baby, their rep exclusively confirms to The baby is due later this year.

The "Private Practice" star, 38, and the Tony award-winning actress, 37, first met on the original 1996 Broadway production of "Rent." After seven years of dating, they got married in January 2003.

Menzel hinted to


last January that once she finished promoting her third solo album, "I Stand," she would consider starting a family with Diggs.

"It's definitely in the plans," she told Us. "I'll settle down and start popping out some babies."

She said Diggs has been ready for kids since "the day I met him."

"He wouldn't talk about marriage, but he'd talk about me having his children," she told


. "He's always wanted kids. He grew up with four younger brothers and sisters, so he's very comfortable around children."