Baby under the radar! It's Always Sunny in Philadelphia superstar Glenn Howerton and his wife Jill Latiano have welcomed a second son into their circle of relatives — and they've controlled to stay his birth a secret!

The satisfied couple decided to use their look at the Go Go Gala at Montage Beverly Hills on Thursday, Nov. 13, to announce their new child's arrival to Us Weekly.

Baby Isley Ray is slightly brother to the couple's firstborn son Miles, who used to be born in 2011.

"We’re announcing our baby tonight," a cheerful Howerton, 38, informed Us at the purple carpet.

"We just had another baby three months ago," his wife Latiano explained, "and no one knows about it," she added, guffawing.

"With the first one [Miles], it’s not like we announced [his birth] but it came out somehow. This guy came out under the radar. I think because around the time we were having the first one we went to a bunch of events and she was super pregnant so [this time] it kind of happened without anyone knowing. As a matter of fact, because he was a home birth he actually doesn’t even have a birth certificate so technically he doesn’t even exist!"

The parents-of-two additionally published their second son's identify had a showbiz inspiration.

"Honestly, we could not think of a name for this child and we started looking everywhere. And then we were listening to music on the TV and there was a great Isley Brothers song on and I said, 'Isley! That’s kind of a cool name.' And we put it on the list. And then when he was born we kept coming back to Isely, so," defined Latiano.

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"And Ray is…my mom's dad’s name was Rayfield so it’s kind of an ode to him," added Howerton.

Howerton and Latiano married in September 2009.

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