The couple, who stepped out for the first time publicly on Saturday, July 19, at the Opening Event of Sound Waves At The Beach at Gurney's Montauk Resort & Seawater Spa, have been keeping their relationship "super hush" for months, one source tells Us.
"They've been dating for a few months," a source close to Ronson tells Us. "They're really happy! He is super sweet with her." The source adds the lovebirds met through Charlotte's sister, Samantha Ronson.
An eyewitness tells Us at the event on Saturday, Ruess was "very incognito and didn't want to pose for photos but stood close and held Charlotte's dog Oliver … it's been super hush!" "They were introduced awhile ago and have met a few times but it recently turned romantic," a third source adds. "They have quite a few mutual friends actually. It's cute."