Are Ashlee Simpson and Evan Ross an item?

After seeing these photos of the two leaving Teddy's at the Roosevelt Hotel in Hollywood at 1:30am on Tuesday morning, we're inclined to believe so! After Evan helped Ashlee into the back seat of their chauffeured car, Ash could barely contain her giggles ... seems to us like their night didn't end there!

Ashlee was all glammed up in a floral dress and a full face of makeup, and while she's been maintaining a pretty low profile on the party scene, last we checked, she's single.

Jessica's little sis split from Boardwalk Empire star Vincent Piazza last November, and while thought Evan was still with longtime love Cora Skinner, after reports popped up this January that he was making out with Rita Ora at Goldbar in SoHo, we're not so sure.

What's going on with these two?!