The former `Gossip Girl` actress - who was previously in a relationship with her co-star Ed Westwick - has got together with the `40-Year-Old Virgin` actor Jordan `Jordy` Masterson, and the pair spent the Independence Day celebrations partying in New York.
A source told the New York Post newspaper: "They met in LA and spent July Fourth weekend together at a private party in New York".
The 26-year-old brunette and Jordy have also been spending time with `Glee` star Dianna Agron and her new man Sebastian Stan, who is known for playing Carter Baizen in `Gossip Girl`.
It was confirmed in May that Jessica - who played Vanessa Abrams in the US teen drama - and Taylor Momsen, who starred as Jenny Humphrey, will not be in the fifth series of the show, although they could be set for guest roles in the future.
Jessica - who is set to star in teen comedy film `Owned` - found her character having little screen time in the programme, which saw Vanessa go to study abroad.
She is likely to use the time to concentrate on her movie career, which has previously seen her appear in `Piranha 3D` and `Fired Up`.