Johnny Messner and Kathryn Morris Welcome Twins Jameson and Rocco

Kathryn Morris is a mom — times two!

The former Cold Case star and actor Johnny Messner welcomed twin sons on Wednesday, Aug. 21 at Cedars Sinai in Los Angeles, Calif., her rep confirms to PEOPLE.

“Jameson West Messner and Rocco McQueen Messner are now cozy at home loving family life,” the new parents tell PEOPLE exclusively. “We’ve been blessed with 14 lbs. of love from above with these angels. Healthy sweet boys!”

Both baby boys were born at 8:12 a.m., and weighed in at 6 lbs., 14 oz. and 6 lbs., 10 oz.

Although the initial discovery that Morris, 44, and Messner, 43, were welcoming twins took them by surprise, the new mom is thrilled her baby boys share a special bond.

“When the doctor sensed twins from some specific HCG levels in my blood work, he brought us in for the ultrasound and said, ‘Let me just check on something I already know … Okay, there’s one for you and one for you!’ We were shocked and ecstatic,” she recalls. “Now these brothers have a built-in best friend for life! Who doesn’t want that?”

Now almost four weeks old, the 2Bdr/1Bath actress shares that Jameson West — whose name is “a combination of several family names” on Morris’ side — and Rocco McQueen — whose name “represents everything Johnny’s about” — are starting to let their polar-opposite personalities shine through.

“Jameson has a sweet and fiery Irish swagger and Rocco has a laid back Italian cool to him,” Morris says. “We had some names in our pocket, but once they arrived we instantly knew who was who.”

As for the cheek-chomping photo at left, “Jameson was learning to breastfeed in the hospital but got a little confused where to latch on,” Morris jokes. “Rocco has some payback in order.”

The proud parents lovingly refer to Jameson as The Boss and Rocco as Mellow Yellow — together they’re called The Dirty Messners.

“The love we feel is overwhelming … a love we never knew existed. We are truly blessed,” Morris and Messner tell PEOPLE.

In April, three years into their relationship, the actress and Messner announced they were expecting twin boys. “She and Johnny couldn’t be happier,” her rep told PEOPLE at the time.

— Anya Leon with reporting by Charlotte Triggs