If things go well, they're even considering moving in together!
Though it seems like they might be moving fast, Dianna definitely has a history of jumping head-first into new relationships.
Gossip Girl star Leighton Meester and her beau, Sebastian Stan, are taking the next step and getting married, the New York Post is reporting this afternoon.
A source close to the starlet said that the inseparable lovers are engaged - and Leighton and Sebastian broke the news on their "secret" Facebook pages.
She and ex- boyfriend Alex Pettyfer moved in together just months after they started dating in 2010 and were even rumored to be engaged less than a year later!
The two were seen packing on the PDA on Saturday inside the Mc Donald's-Bootsy Bellows Coachella party, where an eyewitness saw the twosome holding hands and acting quite cozy, while another insider saw the two making out inside the bash.
Summer's heating up for Dianna Agron and Sebastian Stan!