The young actors were among a group of celebrities who gathered at the Top of the Standard on Thursday night (28Apr11) to celebrate the upcoming release of action epic Thor.
Julia Roberts' niece recently split from her tennis player boyfriend Dathan Kuppin - but she's not weeping over the break-up and has reportedly struck up a relationship with Overstreet, according to the New York Daily News.
The pair spent the entire evening by each other's side as they mingled with Overstreet's fellow Glee stars Amber Riley, Dianna Agron and Kevin McHale. The actor repeatedly placed his arm around Roberts' waist as they chatted, according to the reports.
Roberts isn't the first big name Overstreet has been linked to - he enjoyed a sporty date with country sweetheart Taylor Swift in February (11) when they attended an ice hockey game together in Los Angeles.