The actor and wife Gina Cirone welcomed a son and a daughter on July 5 in Los Angeles

By Sarah Michaud and Elizabeth Leonard
Updated August 23, 2011 04:30 PM
Credit: Kevin Winter/Getty

It’s a boy and a girl for William Petersen.

The CSI actor, 58, and wife Gina Cirone welcomed twins via surrogate on July 5 in Los Angeles, PEOPLE confirms.

The pair were born prematurely, Petersen’s rep says, but are steadily improving.

“The babies are doing great and are improving every day and we can’t wait for them to come home,” the couple, who married in July 2003, tell PEOPLE.

Petersen is already dad to daughter Maite, 36, who has two young sons of her own.

After leaving CSI in 2009, Petersen was followed on the series by Laurence Fishburne, who has since been replaced by Ted Danson for the new season premiering in September.