January 07, 2013 06:15 PM

Tammie Arroyo/AFF

He’s hunted down demons, gone after ghosts and come face-to-face with ferocious monsters, but Jensen Ackles is diving into a whole new dimension: daddy duty.

The Supernatural star, 34, and his wife Danneel Harris Ackles are expecting their first child later this year, his rep confirms to PEOPLE exclusively.

The actress, best known for her roles as Shannon on One Life to Live and Rachel on One Tree Hill, will debut her baby bump when she accompanies Ackles to the People’s Choice Awards Wednesday, where the dad-to-be is scheduled to present.

“Thank you for all the well wishes,” Harris Ackles, 33, Tweeted Monday evening. “We are very excited about our soon to be new addition.”

The couple tied the knot in 2010 in the actor’s hometown of Dallas, Texas.

— Anya Leon with reporting by Julie Jordan

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