Mario Lopez and Wife Courtney Expecting Second Child

Couple, who tied the knot in December 2012, already have a 2-year-old daughter

More diaper duty on the way for Mario Lopez!

He and his wife, Courtney, announced on Tuesday's edition of Extra that they are expecting their second child together.

"I am the happiest father in the world," the Extra cohost said. "We cannot wait to welcome baby Lopez No. 2 into our lives."

The bundle of joy is due in late summer and will join the couple's 2-year-old daughter, Gia, who was born September 11, 2010.

Mario and Courtney tied the knot last December in Punta Mita, Mexico.

Congrats!