Blake Lively, Leonardo DiCaprio Go Out for Dinner

Lively meets Leo!

Newly single Blake Lively dined with Leonardo DiCaprio at NYC eatery The Lion on Wednesday, an insider confirms to UsMagazine.com. (LaineyGossip.com first reported the sighting.)

But Lively, 23, and DiCaprio, 35, weren't alone.  "It was an 8 person dinner," the insider explains, adding that director Baz Luhrmann was in attendance.

PHOTOS: Surprise! These celebs are pals

And the meal was strictly business: DiCaprio has been cast as Jay Gatsby in Luhrman's adaptation of The Great Gatsby, F. Scott Fitzgerald's classic book -- and Lively is being strongly considered for the role of Gatsby's love, Daisy Buchanan.

The director's "whole crew was there," the source says, adding that DiCaprio and Lively "didn't leave together."

PHOTOS: Stars' big screen twins

Lively would have to fight off strong competition to win the role of Daisy. Scarlett Johanson, Natalie Portman, Keira Knightley and Michelle Williams are also contenders, according to Deadline.

Lively and Gossip Girl costar Penn Badgley recently ended their three-year romance, her rep told Us Weekly exclusively last week.

PHOTOS: Shocking Hollywood splits

DiCaprio is still going strong with Bar Refaeli, his model love of over four years.

Tell Us: Would Lively and DiCaprio make a good on-screen pair?