Kaley Cuoco isn't moping around following her split from ex-fiancé Josh Resnik.

In fact, the Big Bang Theory star, 26, may have already moved on to a new beau.

The actress headed out to Bardot nightclub in Hollywood on St. Patrick's Day, where she and a mystery man spent the evening attached at the hip, celebrating her Zooey magazine cover at a Cellairis-sponsored party.

"Kaley and the guy were giggling all night in the V.I.P. section, where they were kissing, dancing and even did an impromptu photo shoot, making funny faces together," an onlooker tells PEOPLE. "Kaley seemed like she was truly having a good time and was completely being herself."

Adding that the evening seemed "light and casual" for the starlet – who was "beaming" in a yellow ensemble throughout the night – the source says, "She looked like she was just out to have a good time."

Cuoco, whose engagement was announced in October, broke the news of her split at an event earlier this month.

A rep for Cuoco has no comment.

沪江娱乐快讯：去年10月份被爆与戒瘾治疗师男友订婚的卡蕾·库奥科，仅几个月后接受采访时即自爆婚约取消。当大家都以为“潘妮”正处在感情低谷期时，日前有目击者称看到她在夜店与一神秘男子在一起跳舞，举止亲密。”他们整晚呆在VIP包厢里，喝酒玩亲亲，卡蕾看起来很快乐，很自我。”经纪人表示无可奉告，不知卡蕾是不是找到了新的归宿呢？