Ashley Greene and Joe Jonas: Spotted, Going Strong... on Verge of Engagement?!?

Following a guest-starring sting on Hot in Cleveland, Joe Jonas will next appear on 90210.

But it's not the singer's acting career that fans care about; it's his burgeoning, confirmed relationship with Ashley Greene!

The two young stars were first spotted together in early August, but a reliable source claims they've been dating for four months... and things are getting very serious.

Say hello to... Gonas? Ashley and Joe need a nickname. Submit your best!

Ashley and Joe spent the weekend in Jacksonville, Florida, the city in which Greene's parents reside. Said a witness to E! News:

"They were there with two other couples and at first went unnoticed. Then they moved to the back corner for more privacy. They were very cute together; she was caressing him, they were making out and holding hands."

The witness added that a lot of people were "asking for pictures" with the couple because the area doesn't get many celebrities.

Greene and Jonas arrived around 10 p.m. and left a few hours later because the attention got out of hand: "The whole bar was excited," said the insider.

Meanwhile, anonymous friends claim Joe planned to ask Ashley's parents for permission to marry their daughter, but we'll believe that report when we see a ring on her singer. For now, let's focus on more immediate concerns:

These two need a nickname, stat! Jeene? Gonas? You tell us!