Maybe it IS “ALWAYS SUNNY in PHILADELPHIA” as reunited DANNY DE VITO and RHEA PERLMAN plan to renew vows.

The couple, who said they were busting up after 30 years of marriage in October 2012, are now as happy as “love-struck teenagers,” according to a source .

And Danny, 68, has asked former "Cheers" stsr Rhea, 64, if she would be interested in walking down the aisle for a second time.

“Danny thinks it would be the ultimate in romantic gestures to renew his wedding vows with Rhea,” the insider told RadarOnline.

“He suggested it to Rhea, who wasn’t against the idea, and told her it’s something they should definitely consider.

 “Rhea’s not one to make a fuss, so she may say there’s no need, but she does like the idea of being romanced by Danny all over again and is happy with the effort he’s putting in to repair their marriage.

“They are as happy as teenagers in love at the moment, so anything’s possible.

“If it did happen, it wouldn’t be a glitzy affair and would likely just be Danny and Rhea, as well as their three kids, Lucy, Daniel and Grace, who would attend the ceremony.”